It's not really from what your describing a sound form. Sure it may go in like with Shaun Marion and people like that, but it's gonna be hard when the you are trying to shoot with a man with your face. He will probably stuff you hard if you do that motion slowly. To get the best shot, when you move down make sure you already have the correct form, and have the ball in the same position. If you move the ball down or up before you shoot, you will prob lose alot of power. My shot is pretty well off, not like the best ever, but it is still pretty good. I know it is kinda confusing in text. Just remember that keep your knees only so low that you just "pop" off the ground, keep your wrist and elbow in a 90 degree angle and release the ball with the fingertips of the pointer and middle finger touching last. Doing that a few times will help your shot. After I tried doing that, my shot got better.