Just b/c I can:
This looks like a GREAT example of the "Patient Whistle" theory. It would be nice to see what would have happened had the shot not gone in. Would a block or a foul on the player trying to block the shot been called? It may just be the official waited for the bucket to go in before they determined if the contact was enough to disrupt the shot. So they ignored the block/charge and the other defender following thru and contacting the offensive player as they were both going to the ground!!
Man I am ornery today!