Was the clincher, really.  He forced Dallas to use it's first time out on that run, a first down run, giving us two more downs to waste their time outs, and thus giving us a whole down to nearly run everything out.  If he doesn't make a first down clutch run there, the 'Boys get the ball back with about 50 seconds left instead and the outcome becomes more interesting when you take into account Plack's shitty punt.