Marquette grabs a rebound, up 1 with 59 seconds left. Belmont's guard, Bradshaw is down on the ground with a cramp so it is 5-4. Duane is wide open, no one around him, and shoots a 3 instead of driving to the hole. Misses the 3, Belmont with the rebound and the rest is history.
I know Duane doesn't know what is going on behind him, but would have been a better play nonetheless if he drives and tries to create something.