I got Dr Stocktons Catching video and he showed two ways to throw: spin (on right leg, you never lift right leg off ground until you throw) and one where both feet move before throwing. I assume spin throw is only for when there is a righty up. Are there other ways, perhaps faster.
Also, on the video the catchers demonstrating were moving up as the ball was coming. I always thought this wasn't good because it can take away a strike. When is it and when is it not permitted?