[TiK]

I'm gonna take a stab at this.

I'm gonna say that centripetal force causes it to move either right when spinning clockwise or left when spinning counter-clockwise (you said anti-clockwise haha, you silly Brit [img]/images/graemlins/grin.gif[/img]).

Edit: Ok, maybe it's not centripetal force, now that I think about it. Centrifugal force? Well, centripetal force is the force pushing in and centrifugal force pushes out. Hmmm. Well, the direction of the velocity of the object spinning is tangent to the circle, so...hmmm...now I'm just talking out of my ass.