VIDEO: Celebrate the 4th Anniversary of Holly Holm's Stunning KO Upset of Ronda Rousey at UFC 193

On this day in 2015, UFC fans witnessed one of the most shocking upsets in the history of mixed martial arts. The UFC 193 main event clash between bantamweight champ Ronda Rousey and challenger Holly Holm generated an abundance of hype in months leading up to the bout, but Rousey, a heavy favorite, was always expected to walk away with another convincing win. That ended up being anything but the case, however, as "The Preacher's Daughter" utterly dominated Rousey after she refused to touch gloves ahead of the first bell. In the second round, Holm delivered the match-sealing blow with a kick to the side of Rousey's head that sent her crashing to the mat. After pouncing on her foe to finish things off, the referee ended the fight. Game over.

Holly Holm vs Ronda Rousey Fight Highlights From UFC 193

Talk about a beatdown! We're not so sure that Rousey landed one clean hit during that highlight. Holm, a former boxing champion before converting to MMA, was landing devastating blows every time Rowdy Ronda got close.

Each time that Rousey lifted her head, her face looked bloodier. It was just that kind of fight for Holm.

Then came THE kick.

Holm was a more than deserved UFC women's bantamweight champion after that iconic moment. Four years later, it still hits like a ton of bricks.