I'm looking for that cartoon series...
 

Just remember one episode, where a bunch of guys trick another guy into thinking it is cool to jump from a hill and break all his bones...

It's a comedy cartoon series as part of a us comedy show I think... saw it on youtube a while ago...

hope you can help me...

I guess they where from a series on comedy central or so...

ah, found it again, it was ROBOT CHICKEN