Ok, so I have faced or caught some of the best pitchers in Michigan/Indiana/Canada/US. Planger, Sabin, Gillis, Braunchard,Feiner, Boyd, Bender to name a few. A properly thrown rise sure looks like it rises. Bill had a good analogy of the plane taking off. If the spin is right when the speed hits the mark it jumps. My trained owl eyes says it jumps! You can't get more scientific than that! I think most girls have inappropriate spin but even though it's not exactly right it's still getting hitters out.