From shots to the cup that make crowds groan in unison on slo-mo replays to knees and kicks to the heads of grounded opponents, fouls are a part of MMA.

How those fouls are handled by the referees seems to be the thing that changes from foul to foul, but the fouls themselves always are around. And some are a lot worse than others.

Take a look back at 15 of the worst fouls in the history of MMA. What didn’t make our list that should have?

15. The entire career of Viacheslav Datsik

Viacheslav Datsik is no fan of rules, in or out of the cage. He’s been disqualified on multiple occasions for offenses such as grabbing his opponent’s testicles and for gouging an opponent’s eyes. He’s also been known to attack referees, and once was declared the loser of a bout because he wouldn’t stop showboating by pretending to be hurt after purposely taking punches from a much smaller opponent. Datsik became so enraged by that loss that he punched the referee, who quickly fought back, leading to a melee that spilled out of the ring. Datsik has also been arrested on numerous occasions, at one point posing as a crusading vigilante in his native Russia.