Alstork was a bonehead for walking to the basket. Look at the GIF. He did not touch Morgan. But a foul could've been called, remember TV was reffing, just because it was close and if the game was not over when Morgan touched the ball on the rebound. Once Morgan touched the ball game over. Still Alstork should not have been close to the basket. Walk away man, walk away. I think Alstork may have been taunting but could not see if he mouth was moving as the GIF is fairly short.
If you see the sideline angle video which is part of the Illinois highlights, you notice no one on the bench, or behind the bench starts celebrating because I think everyone thought a foul was actually called.