I think it was Duzey's 85 yard TD. What was amazing to me was that he actually PULLED AWAY from tOSU DBs.
As a smash-mouth football fan, I like Weisman's nebraska TD (OK 1 yard line) run where he bounced off of people 3 times, followed by the Michigan TD.
Powell's TD at Minny was a missed tackle followed by amazing speed.
The OP was asking about OFFENSIVE plays. If it were any play, I think LTPs sack of Kain Colter to end the jNW game was the most significant, and probably the play I will remember the most about the season. Great effort after he whiffed on his first try and a big moment for the whole year.