Conor McGregor KO’s Dustin Poirier In The First Round At UFC 178 

Conor McGregor told everyone that he was going to knock out Dustin Poirier in the first round at UFC 178. AND HE DID! McGregor caught Poirier with a questionable punch that landed behind the ear of Poirier, which stunned him, and then ended the fight with a flurry of punches. McGregor is one of the most popular fighters in the UFC, you can see why.