"what's the record for quickest Heisman bust ?"
Well, I have to say FLorida has impressed me! I really do feel sorry for Troy Smith. But he still has a ways to fall before he rivals the thrashing Jason White got in 2005.
2005 Jason White 24/36, 244 yards, 2 TDs, 3 INTs, -8 yards rushing, 0 fumbles
T. Smith (at present) 4/13, 35 yards, 0 TDs, 1 INT, -15 yards rushing, 1 fumble