What are the best dirty or unconventional techniques pulled off in the octagon?

[Iron Skin]

Tank trying to throw a guy out of the octagon

 

[Fergelmince]

How bout dc eye poking everyone and their mother

Nah, cormier is such a good guy and a family man. He would never cheat in the octagon.

 

[KantoTerror]

 

[Beastos]

Easy! Only OG's will know this. Ivan Salaverry's back mount body triangle