Haha, that video was awesome.
My local college has a small jazz band made up of students, and at their latest performance a couple days ago they had a new pianist. He was crazy, dancing around and banging his head, making exaggerated motions and stuff. Basically trying to be showy. The funny part is, he only did that when he was hitting some simple chords, once his solos came he would completely stop and get all rigid xD
I myself try not to make any more movements than necessary. Wouldn't wanna tire myself out
