. >> this is gonna zbluk is normally a pretty upbeat guy, but he already says this is not going to beday. he has some things in his backpack, about 500 of those things. they've got 500 mouse traps, they're going to set them up beneath the slack line. ben is a pretty good slack shriner. he gets himself ready, wants to have as much skin exposed to these mouse traps as possible. first he tries to walk across. >> oh, this is scary. >> he ramps it up once he's walked across and starts pulling some of his tricks. but he still makes it look pretty easy. backflips, front flips, no problem at all. but it doesn't all ends so well. >> ooh. >> you just heard them click, click, click. >> it's on his toe. >> ooh, that looks -- >> oh. >> some of them really hurt. got one on the pinky finger that really caused some pain. one, though, really caught him more than he even noticed at first. >> he's bleeding. >> he's bleeding. >> check this out. >> ooh. >> got a pretty bad cut on his ankle from that. >> it's not just a flesh wound. >> who else wants to try? >> now rodney's turn. rodney's slack lined like