this guy is sergei, this jump set up by the same guy that set up the previous jump, stanislav.s time on top of a power tower. he's on hooks. he jumps. >>> the can knopy is already ou >> i feel like i can feel this in my back. >> how do you test this? you don't know how thick someone's skin really is. >> these are the tests. that's why they're doing these jumps they're going to push the ante by having the can know pi deploy from a bag. it's going to have is that jolt. they rigged this pack so the lines are on the hooks on his back. >> i feel like these aren't tests. i feel like these are leaps of faith, because -- >> you'd die. >> right, you get one shot, that's it. >> it is dangerous. it can hurt or kill you. don't do this. >> don't worry, i won't! >> he jumps. canopy deploys did you see that jolt when the canopy opens, how to pulls him back a bit? they know in terms of distance it's a safe jump. the question is, did it rip? >> i bet it did that jolt. your skin, it wasn't designed for this. >> here is what his back looks like. >> nothing. barely nothing. >> no, just the holes f