Dustin Hoffmann Thwarts a Robbery!

A hold up at a New Jersey Dunkin' Donuts was quickly derailed when the crook got clocked in the head with a tin cup -- by Dustin Hoffmann!

Ok, not that Dustin Hoffman. This guy spells his name with two ns. And he's a quick-thinkin', goatee-sportin' cashier who simply wanted to "look good" on the security video. For the love of YouTube!

"What was going through my mind at that point was that the security tape is either going to show me run away and hide in the office or whack this guy in the head, so I just grabbed the cup and clocked that guy pretty hard," the twenty-something aspiring musician told The Bergen Record.

Meanwhile, we found the real Rain Man signing autographs and sending a shout out to the troops in Iraq last night at Ago.