UCLA fan viciously smacks USC fan in the face during rivalry game

It looked like there was an episode of “Power Slap” taking place in the stands during the UCLA-USC football game on Saturday.

In a video that made its way around social media, a female fan, who wore a UCLA bucket hat slapped a male fan while he was sitting in the stands at the Rose Bowl Stadium in Pasadena, Calif..

The blonde woman stood over the man — who was wearing a red sweatshirt, a Trojans color — wound her arm back and struck him hard as fans nearby were visibly stunned by the incident.

Warning: Adult Language

“Woah woah woah, what the f–k,” someone can be heard yelling. “What the hell!”

The woman caught herself after the force of her haymaker caused her to stumble.

The man in the red sweatshirt was seen touching his face to assess any damage before looked up at the woman and raised his hands in the air.

Fans nearby looked on while the woman took a few steps back while staring down the man.

It is unclear if the two knew each other or what sparked the vicious scene.

The fans have yet to be identified.

It is also unclear if stadium security or authorities intervened.

Despite the ongoings in the stands, the Trojans rallied back to defeat the rival Bruins 19-13 and became bowl-eligible.

USC quarterback Jayden Maiava passed for 221 yards, including a 4-yard touchdown to Ja’Kobi Lane in the fourth quarter.