http://www.slate.com/id/2124309/?nav=tap3
(Article about a 9-story skateboard ramp)
I've seen this on the X Games, and all I can say is that these guys are fucking insane. Dropping into a 12-foot ramp for the first time is daunting enough (not to mention the first time after you land flat at the bottom). I can't even imagine doing this.
