ugh--according to SI
BIGGEST UPSET: Appalachian State 34, Michigan 32 (Sept. 1, 2007)
While parity has softened the magnitude of many upsets, there's no overstating the shock of a I-AA team (albeit the defending national champion) knocking off the nation's No. 5 team and all-time winningest program in front of 109,218 spectators. The Wolverines boasted stars Chad Henne, Jake Long and Mike Hart, but Mountaineers quarterback Armanti Edwards stole the show with 289 total yards and four touchdowns. Corey Lynch's last-second field goal block sealed it.
Horrible, horrible day! Worst day ever.