Brute knocks woman unconscious in vicious beating at Rüfüs Du Sol concert in Rose Bowl

A terrifying viral video shows a man savagely beating a woman at a concert in the Rose Bowl on Sunday night.

A bystander captured the man pummeling a helpless woman and her friends at a Rüfüs Du Sol show in the famous stadium in Pasadena, California.

In a social media post, the victim said her boyfriend had accidentally spilled his drink on the man, who stormed off — only to return a half hour later, screaming death threats.

The woman said she put herself between the two men, and the attacker snapped, knocking her into the bleachers and pounding her again and again.

He punched two other men as the crowd pulled him off the woman, according to her account.

“This man PUNCHED ME IN THE FACE! I was completely knocked out and there was blood pouring from my face,” the woman wrote in a Facebook post along with the video.

He then “continued to attack” her boyfriend and another friend, she wrote.

Pasadena police confirmed the details of the attack to ABC 7, but they have not arrested a suspect, who the victim said “ran off into the crowd never to be seen again.”

She spent the rest of the concert in the venue’s medical tent but made it safely back to her hotel, she said.