Loudest games you can remember at the Big House.
2003 Notre Dame (Pre kickoff and until it was 14-0 and everyone realized it wasn't a game anymore)
2004 MSU Comeback (It was louder with 15% of the stadium gone, the place was shaking. Also the beginning of the - now misapplied - comeback song by the band)
2005 PSU (So loud it was resonating in the parking garage by Palio apparently)