It's sometimes called freerunning sometimes parkour but whatever you call it it's fun. Imagine yourself vaulting and jumping sliding around and under obstacles and climbing walls and that is parkour. At least that's the basics, check the wiki on more in depth information. For his birthday my mate wanted me to film him doing some, he's just recently started so be kind. I'm doing what I can to help him reach 1000 veiws for his birthday!