Need some help on a blocked shot

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Airborne shooter ends up on the floor. How did he end up on the floor?

Was it because he was out of control and could have ended up on the floor by his own doing? If so, then the contact could be ruled incidental and you have nothing but a split lip.

If he was under control and would have returned to the floor in a normal fashion, but didn't, then the contact is a foul.

We get a split second to decide this.

This is what we all signed up for ladies/gents.