5. Al Iaquinta
After earning a split-decision victory over Jorge Masvidal at UFC Fight Night 63 Al Iaquinta let the boos from the crowd get to him. An emotional Iaquinta did want countless other fighters have probably wanted to do; he fired back at the fans.
Iaquinta explained his actions afterwards, stating that he felt good about the victory and didn’t think the fans should have been booing him.