If you are an experienced skydiver I am sure you easily will be able to control your suit on your first jump after briefing. Outside you have hunderds of meters for flying maneuvers and testing skills. In the tunnel you only have 6 square meters to try the same. Thats is what makes it difficult ;) Blue Skies

yeah, I understand, but the same suits brands said that you need like 200 to 300 jumps with beginner suits to be able to control the pro suits. That is the thing that seem hard to understand why.. an over exaggerated safety measure?? I imagine that you need to be very strong on the arms, because they kinda support most of the your body weight.. or not?

@@AngelLestat2 Think of a slackline. It seems like it's just a rope under tension, so why would it be difficult to balance on it? The thing is that your body (or better said the brain) needs to learn to control muscles in a way it is not used to. And even more important: those movements have to be tiny. It's less about force than control. To learn that takes time.