What's Clashem? It's a game – and a rather simple one at that. Two videos simultaneously, users pick the winner. This simple little competition gets a lot of action – particularly from the freerunning crowd. Take a look at our top 10 moments of how-did-they-do-that freerunning wizardry.
Moving like a monkey
Wow factor: High – we're absolutely sure your average human can't do this.
Twist and flip
Wow factor: 6/10. Indoors. Are there mats under there? Wuss. Nice dismount though!
American Ninja training
Wow factor: From the video, Kawui appears to be training for American Ninja – impressive!
Wow factor: Super slo-mo action while flying through the air, all with no leg power? Wow indeed!
Colour us wowed
Wow factor: gap to gap to flip – we'll give this 8/10.
Wow factor: There's no flips or tricks, but that girl just cleared a 4m wall in about three seconds. Impressive!
Going off the wall
Wow factor: Taking the fifth on this one.
A balancing act
Who: Chase Cody
Wow factor: Undercover 9/10 – not impressive at first, but then you think about how hard that actually is!
Wow factor: Backflips followed by backflips – sweet!
Off the wall
Wow factor: Where is he? How did he do that? OK, fine, it's pretty cool.