yer as another user said, I imagine it to be a rebounding contest, where the end result is an out of bounds. This does happen fairly regularly in real basketball.
They could probably just change the text description to be better representative of this though. Seeing "Player X attempts a rebound but it goes out of bounds" sounds to me like something you would see on a Shaqtin-a-fool episode.
"JaVale..... attempts the rebound...but the ball bounces of his head....goes out of bounds"
haha. thats kinda funny ahhhhh.
anwyays, yer if they changed the in-game description to be more of a 'The ball is knocked out of bounds in the rebounding contest, last touch by team X",
I reckon that would sound better.