take control of your sleep with unisom. >>> what do we know about them? like to bounce. >> yeah. they're like tigger. >> they're always finding new ways to kill themselves. >> this is a bad idea. this is a really, really bad idea. >> like every idea they've had ever. >> they start a lot of videos like that but they do it anyway. >> we have to take that trampoline off, move that trampoline, take the biggest one, put it here. figure out which is second biggest, up to six. >> six trampolines is what they're going to stack. in turn they say they get over 20,000 likes, they'll up it to eight. and eventually they want to try stacking ten trampolines. they start to move all of the trampolines in place. >> what keeps this thing from toppling over? >> luck. cross your fingers. >> successfully stacked six. >> once they get the sixth one up there, it is go time. got the first guy, second guy, third guy. and they just keep going. >> so far it's working. >> yeah. and look, they took precautions into consideration by tying them. >> back flips. front flips. belly flops.