I agree with Norm's choice, but here is another some of you may remember: Several years back, I think during Doc's tenure, at Texas Tech. Pretty much a miracle finish. There's a scrum on the sideline between the 3 point line and midcourt line with a couple of seconds left. Somehow Charles Richardson gets the ball and launches a 3 pointer which is good for the win. My memory is foggy but Chuck may have also saved the ball from going out of bounds. I do remember it was an awesome hustle play by Chuck.
Another, not up to that standard as a hustle play, but at Okie State, Wes Wilkinson has an open 3 for the win and freaking air balls it--yet a Husker hustles to the air ball and tips it in for the win. Can't remember who made the tip in. Each year it gets a little harder to pull up things from the past--or from 10 minutes ago.
EDIT: On the win at Texas Tech, it was the TECH player who saved the ball in bounds to Chuck, of all things, and Chuck fired up the shot. Which was ultimately a 2 I believe. But still for the win. Doesn't fit Norm's category, but it would rank up there as one of the craziest (and perhaps luckiest) finishes ever.