Throw in/backboard

[APG]

Originally Posted by Freddy

I beg to differ with MillyBac, but it seems the laws of physics helps out a little here. If the ball, tossed courtward from OOB deflects off any part of the backboard and proceeds farther into the court, it cannot have hit the back of the backboard. If the ball deflects off part of the backboard and proceeds back again OOB, that same law of physics suggests it must have struck the back of the backboard. Even if it bounced straight downward, you wouldn't have anything, would you? It cannot deflect downward if it hit the back of the backboard.
Am I on the right track here? Or am I being a Drain Cleaner about it and grossly misunderstanding the difficulty making this call?

I agree, this play isn't nearly as difficult as Billy is making it out to be for the exact reason you pointed out and it was how I was thought to judge the play.