10-10 tie in the Ten Year War | U-M 10, OSU 10 (11/24/1973)
The dastardly tearing down of the M Club banner by OSU before the game. A broken collarbone for Michigan quarterback Dennis Franklin. Two misses by Supertoe, Mike Lantry. One of the most epic games* in the entire Ten Year War ended in a draw and would have long reaching consequences for both teams and for the Big Ten Conference.
(*-So epic it has its own Wikipedia entry.)
Also worth noting. The National Championship Foundation awarded their 1973 National Championship to 10-0-1 Michigan. Were this Alabama, Bo would have his national title.