If you know Return to Castle Wolfenstein-Enemy Territory you may know, that you can trickjump there a lot.
I like to play a special mod that is called " AP TJmod" (AP=Advanced Physics). With this Mod you are able to jump in ET like you can jump in Quake3.
Those are some videos by mehttp://www.xfire.com/profile/demonvulga ... ?count=120http://www.youtube.com/user/Farmingmage ... e=mhum#p/u
Videos of ET trickjumping got a bit better quality at youtube because I remade all videos again and recorded them a bit better. Those at xfire got a bit to dark.
Needs good reflexes and knowledge when to press which key + good mouse movement.