The Asian X Games are in Seoul this weekend. I saw some of the skateboarding competition and some guys doing fun tricks on bikes. The most impressive sight of the day, by far, was the Moto X demo. This is where you ride a motorbike really fast up a ramp which hoists you into the air and then after you soar for about half a block before you come down another.
The thought "Wow. That's not safe" ran repeatedly through my head. You must be insane to engage in this sport.