Diesel said:
The hardest hit I witnesses was Washington State 1995, the Griz had a RB from Great Falls High that also was a kick returner. As he caught a kick off a WSU gunner launched and crowned him helmet to helmet. That was the only call that went for the Griz all day. The RB was instantly knocked out and the refs gave possession to the Griz. Think it made ESPN hit of the day. It was violent live and nasty in slow-mo.
That would have been Scott Spraggins. Hardly played, if ever again, after that that hit.
Biggest hit I have seen would have to be Kurt Schilling absolutely clobbering a South Dakota State player in Dickensons big comeback game in 93'. That hit was so hard it sent the guys helmet about 10' straight up in the air.
Keith Thompsons was second
Dave Decoite getting sucker punched in the balls by Northern Iowa is 3rd.