Ball doesn’t go in, but everyone thinks it does.
The funny thing is, the guy who takes it out of bounds isn’t the only guy who makes the mistake. EVERYONE else does; they all start heading up court, or get into position to take the in-bounds pass!!! 
Yeah, I have to admit, I think I could make that mistake. Depends on the perspective.
Props to the ref, even if he did hesitate a little.