Renzo Gracie no contest.
Stepping on a prone guy's neck could cause serious injury especially when they are fully relaxed knowing the fight is over.
Renzo then being 'unable to continue' against Shamrock after a pretty benign knee on the ground years later made me chuckle. Renzo's a character, you have to give him that.
Last edited by RearNaked : 11-11-2012 at 10:58 AM.