…players to launch off of in an attempt to get higher and block the kick, same applies in other aspects of the game.
I remember playing church ball as a freshman in high school and we did a fast break where the guy in front would drop down on all 4’s in the middle of the key and the guy behind bringing the ball up would then step off of the small of the back of the guy on all 4’s and elevate for a wicked dunk. We got away with it a couple of times until one ref called it.