Holy crap!
All right, so to set this up, all you need to know is that "the blob" is a giant inflatable raft that you jump on in order to launch the person sitting on the far end into the sky. It's basically a staple at summer camps and you can get some decent air depending on how heavy and light the people involved are.
Walt Disney Pictures / Heavy Weights
And obviously, when you add more weight and a higher launch point, you get better results. Let the guys from Jackass explain:
MTV / Via youtube.com
But even the Jackass crew can't touch what a few guys in Switzerland accomplished in the summer of 2011...
Yep, that's a world record blob jump of 17 meters (or roughly 55.8 ft).