Everybody knows (or at least knows of) skateboarding tricks. Well, the simple concept behind this often interesting and physically challenging extreme sport is to take skateboard tricks off the board.

Grind on the bench, do flips in your dismount, build speed to take off up the wall, do whatever you can think of. It's fun to do alone, but that's technically only practice for the real thing. Head to Head challenges are the only way to settle disputes over the best freestyle walker. Heat can run high in these intense competitions where walkers compete for fame and glory. So dust off those Airwalks, head on over to your local walk park, and make everyone eat your sneakers' dust.