No call or foul? (Clips)

[BryanV21]

Originally Posted by Sharpshooternes

Let's take this lane for a moment as I am curious. A1 jumps straight up for a three point attempt. B1 jumps directly toward the shooter and gets a hand on the ball forcing A1 to start to fall backward. There legs contact eac other after the shot is blocked and A1 goes to the floor. What is the call?

I would deem the contact between the players' legs to be incidental. The leg contact had nothing to do with the shooting motion of A1.

And I'll reiterate a favorite question around here... what did the defender do wrong?