I'll bet you thought this was going to be a cat spinning in a circle, didn't you? Well, this is a bit more advanced than that. Hold your mouse over any spot, press and hold space, and the cat will slowly rotate counter-clockwise around that spot, without turning itself! You can also move the mouse around, the cat will shift it's rotation center to that spot instantaneously! This would be useful for a sprite with two rotation centers, so it could orbit around a spot. and spin the opposite direction or something.