1. When someone loops, and the person blocks, the ball goes out...if the ball really rides up the rubber, shouldn't it have backspin when it comes back? Since friction accelerates the spin. For instance, when I sidespin, the ball I get back is the continual motion of the ball, instead of its opposite due to angular rebound...am I being clear? 2. Why does looping on a chop is more spinny than looping on a loop? In my head, the rebound speed should be just as much as additional speed. 3. Which is a better chop/topspin, horizontal ways, or vertical ways? I know they are the same amount of spin, but which is harder to return...for instance, which chop runs to the net more...meaning harder to loop?