The Top Level Test -- by Harry Lorayne

[@RobertBallMagician]

Love this trick, nice performance. There are so many ways to do this. Harry Lorayne is a genius.

[@stuartdrogbadunkno]

One of my favourite card tricks. Very nicely done 😊

[@RonaldJayArceo]

Stuart Huggins thanks. One of my favourites as well.

[@magicjack]

Bob Hummer is credited for the discovery of the principle, Harry just put his twist on it. If you like the principle, definitely check our Bob Hummer books.

[@davemarshall9155]

tutorial please

[@TheMagickev]

Buy the book Jaw Droppers by Harry Lorayne rather than asking for a tutorial.