That's to be expected, though--it takes a lot of gravitas to make one of those things work.
I've ridden a Segway, Bush made two mistakes.
1)He tilted it back and stepped upon it - he threw it into reverse basically and it went right into him. Stepping on it activates it and tilting back goes backward
2)He had a tennis racket in his hand - not the smartest thing to do.
Somebody didn't tell him how to ride one properly, and it is funny as hell (yeah I laughed and laughed hard, because I saw instantly what his mistake was - I saw somebody else do the same thing and it was hilarious). Had he been hurt, I wouldn't laugh, but it is funny.
I do like the Segways, pretty amazing (and the inventor is an interesting guy, too bad we don't have more like him).