When I'm playing poker (or doing anything else at the computer where I'm a little nervous -- at the beginning of online Warcraft/Starcraft games, for instance), when I'm not actually using the mouse for a second or two at a time, my mouse hand is constantly moving on the mousepad. I pick up the right side of the mousepad and sort of flick it with my fingers. By the end of a long, intense poker session, I often have black goop from under the mousepad underneath my finernails. Had to replace one mouse pad so far.

When I was a professor, I used to pace constantly. My students thought it was because I was really nervous. Nope: when I'm very nervous in front of groups, I totally freeze. Pacing just keeps my brain going, and I can only do it when I'm feeling good. I'm always a *little* nervous in front of a classroom (or any room full of people), but when I'm feeling good it's a good nervous and it comes out in energy and pacing and probably hand-waving and telling stupid jokes.

When I was younger, I was totally fidgeting all the time. My legs would go, my arms would go, everything. That tendency has slowed down a lot in recent years -- and I have gained a bunch of weight during that same time period.