See, I always figured that it was just a reaction to music you like. But apparently it isnt always. People twitch in reaction to music biologically, if you like. I dont know the name of the study, but I can probably find it out, but it basically found that across a massive cross section of people, Floyd makes people twitch more than anything else they tried. Useless bit of trivia for you.

I suppose its not that bad liking Pink Floyd really, my only real music rule is I hate music without a message or a point to it, and where there are lyrics, they are good, so Ill justify it that way