2011 Sugar Bowl vs. Arkansas. Bucks have the ball backed up against their own endzone.
Boom Herron takes the handoff and gets to the two yard line, gets mobbed by about 6 Arkansas defenders and pushed back into the endzone. The refs call it a safety, completely ignoring Herron's forward progress to the two yard line.
It didn't cost Ohio State the game, but it was still one of the worst calls I've ever seen.