Anti-tweaker advice (Score 1)

I keep seeing this guy in the computer lab that i suspect is using some type of 'enhancer' to work on his school projects. He keeps violently jiggling both of his legs, i'm not talking about someone who just taps their foot this guy is all out flailing his legs (for a visual his legs look like a butterfly flapping, or like he's doing that Susuan Summer's leg excercise thing) Its really annoying to me as a non-drug user because of the sound and the fact that is is sitting in my periphrial vision. For future reference is there anthing that i can do that would make a tweaker annoyed enough to have to leave? Thanks