Some Nervous Nellies and Anxious Andrews let their fingers tap-tap-tap away whenever they're feeling the least bit anxious or nervous- and that tap-tap-tapping drives me up the wall.
I will admit that I've tapped out a RUSH song or three when nervous, and I'm no stranger to using pencils as drum sticks when sitting around in class, but I also know when to stop tapping away.
Because, as this Pain Train Comic shows, incessant tapping can cause the human animal to revert to beast mode, and you won't like those hairless apes when they're angry!
-Via Geeks Are Sexy
I'm guessing YYZ, right? It's their best tapping song. :)