No matter how fun it looks.
The story about this thing is here. As with so many things, I have to tip my hat to the Instapundit on this one.
You know what's really depressing about it? That guy--it's inventor--is eighteen years old. I'm over twice that guy's age, I haven't even invaded my first country yet.
Anyway, my hat's off to the kid. That thing--whatever it is--looks sweet, and I bet it's a hoot to ride.