There are few things more fun than trampolines, as every kid with less-than-responsible parents knows. Sure, there's always a good chance of you launching yourself off the side and breaking your leg/arm, but that's part of the fun! And it's good exercise! Come on mom and dad, pleeaaaase??
Even more fun and definitely more dangerous is the Big Wave Trampoline. Yes, it's a trampoline with water on it, getting you wet while you jump. It'll increase the likelihood of you slipping and falling when you land, which would increase the likelihood of you hitting your head on the edge and being knocked on conscious, which would definitely be a bad thing to happen on a trampoline covered with just enough water to drown in. But come on it looks so fuuuuuuuuun!
Trampoline.com, via Nerd Approved