I Built This in Sipover's Redstone Competition

We got invited to a redstone hosted by the one and only sipover. Finally an excuse to build the most absurd concept I had ever thought of, a blast chamber that uses the blast from a wither before deleting it with a hypersonic railgun. You cannot get any better than that, unless you're the competition. Be sure to check out the crazy builds from everyone involved:
• A1306: / @user-lc1nb9ei8v
• Activation: / activation123
• Beef And Cheese: / beefandcheese
• BritishWeirdo: / britishweirdo
• CraftyMasterman: / craftymasterman
• Cubehamster: / cubehamster
• CubemasterXD: / cubedoesstuff
• cubicmetre: / cubicmetre
• GaRLic BrEd: / garlicbred1
• J2ko: / j2kochannel
• Labster: / labsterlab
• metamilo: / metamilo
• Modiseus: / @modiseus
• MythicalPingu: / pinguwu
• okMongo: / ignmongo
• pi314159265358978: / pi314159265358978
• popstonia: / popstonia
• purpledragonnuke: / purpledragonnuke
• pwouik: / @pwouik9784
• RaPsCaLLioN1138: / rapscallion1138
• RexxStone: / rexxstone
• sammyuri: / @sammyuri
• Sloimay: / sloimay
• SrRodrox: / @rodrox
• Wudo: / wudo
Wavetech Server Discord:
/ discord
World Download:
www.mediafire.com/file/37xjj6...
Mods that I use:
github.com/Fallen-Breath/twea...
masa.dy.fi/mcmods/client_mods...
github.com/gnembon/fabric-carpet
github.com/Andrews54757/items...
Second Channel where I post my Music:
/ @artism6843

[@Pence128]

The obvious next step is to accelerate the arrows with more wither explosions.

[@mantacid1221]

YES. PLEASE.

[@arifpiriyev8610]

Make an arrow, accelerated using withers, kill the withers which were used to accelerate the arrow, thus making a useless machine

[@Water-rg7gp]

@@arifpiriyev8610 not useless if it makes nether stars

[@arifpiriyev8610]

@@Water-rg7gp make all nether stars drop into the void🙃

[@Water-rg7gp]

@@arifpiriyev8610 ah yes, do something to actively waste resources in order to actively waste resources

[@kengored_alt]

Now that's a "it costs 400,000$ to fire this weapon for 12 seconds" moment

[@Rudxain]

Definitely lol, all the Wither heads, the TNT (which can be duped, but Mojang will fix it), and the manufacturing process itself, adds up to a very expensive machine

[@codegeek98]

On a server with TNT duping patched…

[@MW-om4tb]

Is it a Saxton hale skin as well or is that just me

[@didntmeantokillemtwasaaccident]

@@MW-om4tb it has australian chest hair so it most likely is.

[@bluehat4998]

Meet the heavy moment

[@ghostagent3552]

"this basalt farm also doubles as a wither star farm" by far some of the craziest thing that I could imagine someone say about minecraft builds

[@rocket2739]

- Sooo I made this cobble farm - woah ok that's useless - and it also drops nether stars - THE WHAT

[@dabdillon6318]

Seams like that's the wrong way around

[@rasyidpng5437]

This dude should've won if the competition was for game mechanic, because he is the most impresive game mechanic master i have ever known,

[@dinnerboons1504]

@@rocket2739 tbh, I wouldn’t hate having infinite cobblestone because for some reason, I never have enough.

[@parrotsarejustuncookednugg993]

I mean on the prototech smp thanks to word tearing they built an flower farm that doubles as a barrier block farm, well more than farming the barrier block it just places it, you don't actually get it, pretty crazy if u ask me

[@unluckycord3218]

That’s kinda ironic, on bedrock edition it’s the reverse, withers drop 100% of blocks and tnt drops like 25%

[@cubicmetre]

Why?!? Thats so cursed.

[@MrEvanNoyes]

And creepers suck for blocks

[@GothBoyUK]

@@cubicmetre Never a truer word. TNT blast farms just aren't viable on Bedrock.

[@christopher6173]

Palpatine: Ironic, bedrock edition can have withers drop blocks 100 percent but not tnt. Anakin: Is it possible to have tnt drop 100 percent? Palpatine: Not from the bedrock edition.

[@prospect2664]

well, bedrock is a worse version of minecraft aswell

[@TheSidcraft]

Just the fact that you can measure your machine in "blocks per Wither" is amazing.

[@Cosmik60]

'yeah bro my machine runs at about 600 BPW hbu'

[@demopan4446]

Americans

[@duckified.]

i never thought that increasing the arrow velocity would actually make it a deadly bullet like it would irl, this is insane

[@magnusanderson6681]

sounds like someone hasn't seen never4get kzbin.info/www/bejne/g5fUkqKhadOaoZI

[@mathbookair]

A redstoner by the of FastJaz has built a fun cannon using this mechanic with ghast fireballs. It’s easy enough to build in survival and is really powerful.

[@Amy-dq2lg]

well, irl the arrow would probably disintegrate

[@kerbodynamicx472]

@@Amy-dq2lg IRL those hypervelocity arrows are made of tungsten instead of wood.

[@mage3690]

@@kerbodynamicx472 Mach 25 tungsten would probably disintegrate too (or lose speed so quickly that you get diminishing returns above Mach 5 or so), the only solution I see to that is somehow using a laser to flash fry the air and create a path of relative low pressure for the round to travel down. Bonus points being the round should shoot flatter while traveling down the laser path, because it should skip off the denser air below the path. Can't make that round fin stabilized, but it'll be aerodynamically stabilized by the denser air all around the path anyways.

[@CraftyMasterman]

the amount of times we called it a giant weiner amongst ourselves i cant even count lmao

[@an-yr7gk]

among.

[@cubicmetre]

When I look at it all I can think of is calling it the thunder c*nt

[@E12345E]

four balled monstrosity

[@colorfuk1688]

amongst us

[@blandry7339]

I enjoy your videos sir CraftyMasterman

[@huxleyleigh4856]

It's a wither farm with an extra blast chamber functionality

[@derekburm]

"our basalt generator also doubles as a nether star farm" interesting priorities...

[@TimJSwan]

😂

[@BeefandCheese]

You know you're a mad redstoner when lightning is involved XD

[@dtniland]

even though the lightning is aesthetic it is still super cool and makes the build better

[@BeefandCheese]

@@dtniland 200% agree

[@juicetin1446]

Do you know how he added the lightning

[@shilasarkar6003]

@@juicetin1446 lighting rods ofcourse

[@shadow20482]

​@@juicetin1446 command blocks

[@codegeek98]

4:06 That's 0.001% of the speed of light… around _twice_ the muzzle velocity of modern rifles, if Wikipedia is to be believed

[@cubicmetre]

Looks like you need to watch until the end of the video, the actual railgun is much faster.

[@Graverman]

@@cubicmetre ok, but will you do an arrow faster than speed of light in survival as one if next videos?

[@Graverman]

@Tanmay Jain okay, there for sure is a mod that could optimize the game so even if it takes hour to render 1 frame, it still doesn’t crash tho

[@rocket2739]

@Tanmay Jain the speed of light is roughly 300 000 km/s, so 15 000 000 blocks per game tick. That arrow would cross the world from -30 000 000 to 30 000 000 in 4 ticks. I don't believe the code of java can even understand that, let alone any hardware limitation 😂

[@charliekahn4205]

@@rocket2739 it would end up having to preload the target chunk after finding the target coords and then teleport the arrow

[@the_dark_jumper2211]

7:01 my intuition was: "HOLD IT! That's wrong!" - only to discover, after a quick check in-game, that I also got these minor offsets. BUT the tnt entity is 0.98 blocks wide, not 0.99999998, so I doubt these offsets are caused by the entity being smaller than a block, but rather, by floating point imprecisions. (i.e. hardware limitations) Which means, you cannot optimize them away. If a difference of 1e-8 is enough to make the arrow miss the wither, you should increase the distance between tnt and arrow to decrease the x/z offset relative to total distance.

[@cubicmetre]

Notice how when I calculate the momentum given by TnT I used a value of 0.97 instead of the vale of 1.0 given on the wiki, this is because the amount of momentum transfered decreases exponentially with distance from the TnT. So to maximise efficiency you want to have the arrow as close as possible.

[@NoSubsWithContent]

@@cubicmetre I imagine you could have just increased the amount of tnt to the very edge of when it would explode outside of the water. That way you would be able to move the arrow further down and have more precision. You said that there was a lot of extra speed anyways

[@ncolyer]

@@NoSubsWithContent the power decreases exponentially not linearly, meaning you'd need to add an exponential amount of tnt to make up for the distance alterations

[@MCLooyverse]

@@cubicmetre Exponentially‽ I'd expect inverse-square law to apply. Edit: Looking on the fandom wiki, it looks like the "impact" given by an explosion is (1 - r/(2p))e, where r is distance from the explosion, p is its power, and e is the entity's "exposure" (which does not depend on distance, it seems. It is what percent of rays aimed *at* you are unobstructed, not what percent of rays pointing everywhere hit you.). So it's a linear relationship.

[@lythd]

@@MCLooyverse it would only be linear when e = 1, given this guys experience with tnt i would assume he knows what he is talking about

[@nuclearcatpotatoe3714]

- Penile looking object with 4 balls - Fires a small projectile with ludicrous force - Erases stuff from existence - Destroys a being that could only be described as calamity itself Yup, this really is a Go Beyond! moment

[@grenien4109]

I do not understand this reference

[@OlTimeyChara]

​@@grenien4109 jojo

[@grenien4109]

@@OlTimeyChara part 7 or 8 those are the ones I haven't finished

[@lolcat1382]

@@grenien4109 8

[@drvinylscratch1936]

OH MY GOD

[@dragonridertechnologies]

I think this is the literal definition of overkill in several different ways.

[@azekia]

zif his arrow is traveling at 360b/gt; that means it overkilling the wither by 20% of it's health. The Wither. Overkilled.

[@shilasarkar6003]

@@azekia sadly that speed isn't even enough to kill the bedrock wither

[@erumaaro6060]

The NetherStar farm feature offsets the abysmal efficiency in my opinion.

[@Scott-sx9qq]

i totally agree with this. this concept with the supersonic arrow has so many boss farming possibilities

[@lewismassie]

Fun fact, your arrow travels at 25,000 km/h, minimum low Earth velocity orbit is 27,400 km/h. Assuming an arrow is 20 grams, it has a kinetic energy of 482 kJ, or roughly 0.58 Twinkies

[@braxbro6674]

i’m sorry, measuring kinetic energy in twinkies killed me lol

[@jj02mc27]

aMeRiCaNs WiLl UsE aNyThInG bUt ThE mEtRiC sYsTeM!!!!1!1!1!!!!1!1!!!!!

[@livedandletdie]

I doubt that's 443 Twinkies, 482 kJ is only 115 kcal(calorie) we call it calorie in food, because we always measure it in kilo calories.. not gram calories. And thus it's only half a Mars Bar, worth of Kinetic energy. And Twinkies have 260 kcal so it's actually 44.2% of a single Twinkies. Learn your gosh darn measurements.

[@kotik5762]

So then if I eat 443 Twinkies, I’ll die?

[@elliotthedoge9456]

@@livedandletdie wtf is a gram calorie

[@Monkeylordz88]

This machine looks freaking awesome and also sounds amazing! I love how the lightning rod setup sounds like the railgun charging up when you are underneath it. Keep up the good work.

[@GodOfPizza]

my favorite part is the increasingly loud thumps of the railgun charging as its about to fire from all the tridents

[@stuffs8802]

The way the tnt just kept flashing was giving me anxiety.

[@4sety]

What's even cooler is that the damage calculation actually depended on arrow velocity.

[@Squilly4]

wow dude, that machine is AWESOME, and your explanation of it was really clear

[@danielrhouck]

I’ve been thinking for a while about making a data pack which makes some blocks drop things when the SurvivesExplosion predicate is false. For example, if you blow up quartz, and it does not survive the explosion, my data pack would give sand (giving glitchless renewable sand, and mimicking actual artificial sand manufacturing). Now I have a way to take advantage of it and not just a cool but useless mechanic, so that downside is a win for me.

[@danielrhouck]

(It’d probably be easier to find a way to get a creeper to explode exactly right, or use end crystals, but having an option that makes *more* blocks fail to survive the explosion is cool.)

[@dtniland]

it would be cool if cobblestone or stone dropped gravel it when normally would not survive making an easier way to farm it than barering

[@thedigs8563]

thats a really cool idea, i think thats best way to deal with the falling block dupe in a vanilla setting. The dupe bug is really useful in the first place but is really confusing for new players

[@aiosquadron]

I'd love to download your d'pack.

[@dtniland]

and maybe gravel could drop sand

[@ThylineTheGay]

they really should make withers and creepers drop 100% of blocks, especially creepers, not only do they blow up your stuff but they also don't drop everything

[@ultimatedragon4281]

Rejoice, for they actually added a gamerule for that (on the case of creepers)!

[@zdwlees7647]

I love the arrow. Not technically vanilla but if projectiles keep their speed through nether portals u could try using immersive portals mod for a vertical nether portal and redirect the direction of the arrow, that would be sick

[@sansthemedic8581]

This man really went an invented APFSDS rounds to win a redstone contraption

[@CatkinsonGD]

You're so great at explaining the concepts behind your machines to absolute redstone beginners, it feels like most people just skip that or at least skim over the details, but you actually took the time to go step-by-step to show us what each part does and their purpose.

[@arachnatango]

I'm actually really surprised this didn't win, it's an amazing build!

[@princes2eye]

this is the greatest and stupidest machine ive ever seen, great work as always

[@remiyashirou]

It sounds so dope cuz the withers death makes the explosion of the arrow feel like an actual gunshot

[@SophieMerau]

Your build in the competition, should`ve gotten the win!

[@Eis_]

Tbf to the judges, he didn't really complete his goal. But hey, cool railgun!

[@Newo48]

your videos are super entertaining and probably the most straight forward informative videos i've seen

[@captaintuna1323]

Alternative title: I was bored so I decided to build a working Schwerer Gustav Wither killer gun in Minecraft

[@Chris_Cross]

I think at this point, it's actually a nether star farm which happens to produce some basalt as well.

[@clockworkkirlia7475]

This is such a cool video for a ton of reasons. That machine makes an incredible sound, and does incredible things with the game mechanics. The arrow launcher is definitely my favourite part.

[@JesseCase]

It continues to blow my mind about everything it is possible to build and achieve within a block game. I'm not good at all with redstone so I can't even begin to wrap my head around how this stuff works, lol. I'm just amazed by it all. I would have never thought video games would have evolved into something like redstone abilities back when I was a kid and got my Nintendo!

[@Purplers]

Ah yes, the tesla coil majogger Seriously though, this build was nuts, good job :D

[@jj02mc27]

oh hey

[@yeetethdeleteth3307]

Imagine this: tracer arrows that explode We almost got ourselves a functional Death Star

[@Slackow]

Your explanations of everything are really interesting to me. Thank you for this, I wasn't that Interested in technical minecraft until now.

[@okgoodgame]

i concur

[@Slackow]

@@okgoodgame 🎉

[@darth_dan8886]

Absolutely beautiful build. And that sort of velocity in vanilla is definitely very impressive.

[@areohbee19]

Even it's very inefficient, I would probably still build this in a survival world just to flex. Awesome video btw!

[@ultrakatiz]

A really efficient blast chamber, using thousands of tnt per blast xD Accelerating the arrow is a really neat idea though, I didn't even know that its speed affected the damage !

[@katarzynarek5268]

HUNDREDS NOT THOUSANDS

[@katarzynarek5268]

WHYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY

[@madeline6951]

I thought you and Gnembon had a similar vibe, when in fact he's chaotic good and you are chaotic evil

[@jakeeclouse4799]

Wow this has to be one of the coolest builds I've seen so far playing minecraft the last 3 years. Like I can't even begin to comprehend how this works or how to even come up with something like this. Even know I would love to understand it.

[@sebastiangrau8409]

Awesome build. I would like to see a charged creeper blast chamber next.

[@Spike_365]

I gotta say man, *this is awesome* :D

[@meman3869]

“I had a lot of fun building this machene” while he sounds like he has spent more time in Minecraft then life

[@WaffleLover-my1hi]

man that machine is super cool! I had no idea about some many of those mechanics

[@joshuaeisenberger4975]

this is beautiful. thank you!

[@austenbabineaux346]

This completely deserved to win the competition

[@bobdagranny7431]

I love that all that math leads up to...0.2 b/tnt kekw its hilarious how inefficient this blast chamber is ;) I will most definitely make a horizontal version of this, coax a couple of my friends to stand on a specific block somewhere, and then laugh as they die (railgun) and come back to find that all their armour is gone (broken). Great video as always!

[@magica3526]

i dont believe a horizontal version of this is possible without a lot more work, given how much gravity assists in alignment

[@mamushi390]

Talk about a mad scientist! Fr tho this is probably the coolest concept ive seen in minecraft, and ive been keeping up since 2009!

[@Hidinginyourcupboard]

Amazing, great stuff 👍🏼

[@TarBad_]

This is the coolest thing ever. Tbh I think you should have won the redstone competition :)

[@dazcar2203]

using wither explosions to mine blocks has the same energy as humanity harvesting the power of splitting atoms apart to boil some water

[@monchi.dinamonchi]

this is insanely awesome; I wish you the best of luck seeing this video succeed before someone steals the machine, lol

[@Kurogane_Hikaru]

14:52 Ok, this is legit awesome, damn the sound tho, amazing as well

[@justluke0001]

Yo mate have you got any information about smokey? we're all really worried fro his safety

[@cubicmetre]

Yeah me too man, I just found out yesterday after I had recorded this video. I hope he's alright and we should learn more soon.

[@wymantech]

time for a new carpet rule for 100% wither drop rate

[@unikqefox_1576]

This is the most interesting minecraft redstone video I have ever seen. Amazing job.

[@pinkninja62]

7:02 OMFG THE TNT IS GIVING ME ANXIETY

[@trufflesnout5179]

This gave me a really cool idea. Would it be possible to have an interface where you can input the exact coordinates of a target using different ratios of TNT and hit them with an arrow cannon of this power? Now you might be saying, “but how am I suppose to know exactly where to fire just by looking at my target?” Well what if I proposed a system of skulk sensors that could pinpoint the exact location of a target and send that information to the rail gun? Now all you have to do is hit a button and BAMB! Any target anywhere in front of you is instantly annihilated, no matter how strong the target is, and without any collateral damage. Please someone way smarter than me please make this. It would be so cool.

[@KaiWorld]

I always wanted to build a basalt farm 😍

[@hopped1359]

the thunder made you look like a villain purging the race of wither with your creative, most ahead of time super weapon, like hitl-

[@scromly1169]

This is one of the coolest things I’ve ever seen.

[@professorvatcraft]

Technical Minecraft at it's peak!! :D Awesome machine! And the technicality is awesome!!!!

[@mcmadden8364]

SmokeyDog RIP

[@corte_s]

O7 Smokey you will be missed

[@jennashinx6939]

I was listening to TF2 soundtrack "Meet The Medic" around 14:18 when you fired it and it synced up so damn well lmao it was fun to watch

[@sergeychistov8162]

My godness, this is beyond... my... I have no words, this is increadable!

[@LIGHTTACT]

I'm not a Redstone, but I would like to build this in my Survival world. This is my favorite Redstone construction of all Redstone mashine.

[@theFunkyThumb]

Would using healing arrows have made this more viable?

[@Pikachu_mm]

genius

[@MCisverygood]

not really because healing/harming arrows are bugged because both their damages cause s, which cancels out whichever attack is weaker so the healing would do nothing. Plus, it's only like 3/4 hearts of extra damage which would save like 5 tnt

[@mr.browser5941]

Awesome!!!!!! - now use the blast power from the wither to get that arrow to fly even faster!

[@Niborsixoir]

Ni ilmango pudo haber hecho semejante invento tan magistral... lo mejor que he visto en MC en todo lo que llevo jugando MC, wooow

[@chocolad4221]

Engineer's Motto: Turn a 30 minute problem into a 24 hour project

[@jackeldridge1319]

Just to give you an idea - relative to us on earth - the International Space Station is moving at around 28000 km/h, give or take about 1-2000 km/h based on the point it's at on its orbit. This arrow is straightup travelling at near orbital speeds... holy shit

[@gazehound]

if the wither explosion drop rate ever gets changed to 100% this sleeper build will be an ultimate endgame build

[@korok2619]

you can't make that tnt efficient even with 100% drop rate x)

[@cubicmetre]

The point is to flex about how much sand and gunpowder you have from your OP sand and creeper farms.

[@gazehound]

@@korok2619 not with that attitude

[@GuyFromCanada]

Facinating how you managed to recreate the principles of a nuclear bomb; a bunch of “small” explosions to make one big explosion

[@whomidity3953]

And he didn't win 💀

[@totallyrealname8849]

This man made an amazing presentation with multiple hours put into it and got 35k views in a full week. A pngtuber gets 20 times that with 40 seconds of unfunny, boring, unoriginal, and low effort content in a day and a half

[@jj02mc27]

unfortunately true

[@untitledname4740]

Bruh how dare you hate on jellybean YOU MONSTER

[@palea1335]

They know how to get into the algorithm. This? This does not attract the attention of 7-13 year old children. Even if they did click, the vast majority of internet children don't have a long enough attention span to watch the whole video, which would then decrease his analytics, and his priority on the videos being shown to new people would drop. Don't expect to get tens of millions of view by making a 20 minute redstone video.

[@capy9846]

This lost to a game of hangman..

[@darthtitteous1215]

Nice Saxon Hale skin. That itself earned my subscription.

[@lemmesmash]

this is like some mad scientist type thing. those lightnings and the that sound that it makes when it fires is sick.

[@Eis_]

Can't you just drop the Wither into the void to kill it? I'm guessing complications in the item collection would come because of the hole in the middle.

[@cubicmetre]

Well the main problem is that if you let the wither stick around for too long then it shoots explosive projectiles everywhere that break things.

[@fatfurry]

@@cubicmetre cubicmetre you are hot btw

[@Daveir]

@@fatfurry wth

[@fngrusty42]

Wonderful. Plus stay with the learning. I didn't get started in collage till I was 40, almost 70 now . Wish I had more years to study. But still one of the great parts to my life... loved your video. Can't say I have a clue how you do that , mind ya still enjoyed seeing it.

[@treyori9686]

Mumbo casually building this to kill his first wither: "It's quite easy really"

[@Lati22]

Biggest injustice of all this amazing invention loosing for a hangman machine in that contest, you earned my sub

[@megatronVS]

This was my favorite of the bunch by far

[@misellus3931]

this is so stupidly over the top i fucking love it

[@leeuwengames315]

love how the netherstar is the bonus to the basalt and not the other way around

[@BraxtonMeyer]

What in the hell have you been smoking This is batshit insane and I love it

[@rwolterbeek]

They're breaking Minecraft in even more ways xD good work man!

[@imthefatherofyoutube7993]

Amazing work!

[@mulppi8797]

14:50 This sounds genuinely speaking, terrifyingly badass. The increasingly loud metallic sounds that ends up in a climax of explosion, combined with the scifi look of the whole build, encapsulates the vibe of a truly terrifying alien superweapon or some sort of reactor.

[@jonathanmaelstrom2329]

I was just getting into red stone and I used to experiment with tnt cannon designs. The last one I was trying to do was a cannon that would fire the tnt in a straight path. Never could figure it out, and a storm knocking out my power and corrupting my data made me rage quit for about a year and a half by now. Watching this makes me want to finally try again.

[@AtaraxianWist]

You should. More people should experimwnt with explosives. Normalize total server wars!

[@Mizdl]

WOW! This is some of the best redstone I've ever seen! On the other hand, I haven't seen much... It's still extremely epic! And your an aussie too! Your the first aussie redstoner I've actually seen on youtube! And a good one at that. This is just the best contraption I have ever seen, either way. Well best out of its use. Now that I think of it, I've never actually seen a wither farm before :/! It's just amazing how productive your farm looks!

[@thegrimreaper6787]

finally, some Aussie representation in the redstone community!

[@Mizdl]

@@thegrimreaper6787 yes, thats what excited me and with a juuge redstone build like that too!

[@snmfsquirrel87]

All of that just for the ending! This deserves a like

[@olafbryoen5670]

This is by far the coolest sounding machine ever made

[@1_Fro]

sick, i really liked the sipover video aswell

[@finnfalcnr]

this is one of the sickest things i’ve ever seen in mc wow

[@Samuel_LeBaron]

I am absolutely baffled on how he makes these things. I am so impressed and awed.

[@rodneybuckentime4838]

Can't help but notice this mans' skin is a variation of... *SAXTON HAAAAAAAAALE!*

[@matthewcurry3565]

I just want to see teams of people like this go full potential on minecraft FTB with all the redstone options, and machines available including power.... I'd just like to see what you guys come up with.