I realized something yesterday. I shake my legs. All the time.
Well, actually, I’ve known that since I was a kid. But what I realized yesterday (because it was forcefully and humerously pointed out to me by some friends) is that most other people don’t do this. But me, when I’m sitting down, one or the other or both of my knees is sure to be bobbing rapidly up and down. I don’t even have to think about it–in fact, I have to think about it in order to make it stop.
I suspect this may be related to the fact that when I am standing, and not doing anything else, I tend to sway, sometimes quite widely. Apparently, my body needs to be moving in some way, and I have to exert effort to make it stop.
What’s up with this? Is there anything else this kind of behavior correlates with? Do I have a brain tumor?