The Glory 42 kickboxing event in Paris on Saturday featured a wild and terrifying ending to the match between Murthel Groenhart and Harut Grigorian.
First, Groenhart knocked out Grigorian after Grigorian turned his back to him in the second round. It was a crazy sucker punch, but completely legal.
Then, after the KO, fans ran into the ring and attacked Groenhart. One even landed a punch that may have broken his jaw.
ESPN shared the insane footage:

http://www.msn.com/en-us/sports/mma/kickboxing-fight-ends-in-chaos-with-sucker-punch-ko-and-fans-attacking-fighter-in-ring/ar-BBCrQll?li=BBnb7Kz