ever notice that when you have a drink with 2 ice cubes in it, when you turn your body the ice cubes stay in the rotation they were?
@cozykaffe I think we saw a question on the physics stackexchange about this just the other day, actually. It's really just inertia; the ice cubes are only attached to the rotating cup through the viscosity of the fluid in the cup, and drinks tend to have a very low viscosity.