Screen....on all fours

[Adam]

I agree that this could have been prevented prior to the game. I quiet yet firm warning that such a play would result in a Technical foul would likely have stopped him from trying it. Any complaint from the coach if it still happened could have been followed with another T.

Mark, my understanding is that players only have the right to the spot on the floor above their feet (verticality). If a screener leans into a defender, it doesn't matter if he was there first, the foul is still on the screener. I see getting down on all fours as (at least) an extreme example of a screener leaning into the defender. At the very least, I've got an illegal screen.