the best part
I, too, have seen this before, but nevertheless must watch it every time it is posted. It really is perfectly done.
My favorite part is afterward when the guy says 'I'm sorry man' while laughing, as if it was an accident. Also, when he is taking his warm up strokes aiming right at the guy, and the victim's wheels are turning as he is trying to figure out what the guy is about to do.
This really is priceless.