MMA fighter knocks his opponent clean out with a vicious head-to-the-mat slam

That's what you call devastation.

While there was plenty of fighting action Saturday evening between UFC, WWE and boxing, there may not have been a more terrifying knockout than the one suffered by heavyweight fighter Chase Gamble at Next Level Fight Club 5.

His opponent Allen Crowder, snagged a single-leg takedown, lifted Gamble into the air and tossed him like a doll, with his head snapping backwards onto the mat.

That's what you call devastation.