Pasadena police Tuesday were investigating the beating of a woman by a man at a Rüfüs Du Sol concert at the Rose Bowl.
Viral video captured by a bystander showed the man exchanging words with a woman at the Saturday evening concert before unleashing a barrage of right-handed blows that reportedly left the woman unconscious.
The man apparently started punching the woman after she took a swing at him. She was treated at the scene by Pasadena Fire Department paramedics, but was not taken to a hospital.
The video has since gone viral.
The man’s face is seen clearly in the recording, which was captured as the woman and man argued over a drink that was spilled on the attacker.
Without warning, the man suddenly beats the woman down as onlookers desperately try to get him to stop.
One woman nearly pulled the assailant’s pants down from behind, but that did nothing to stop him from battering the victim.
The woman later explained on social media that her boyfriend had accidentally spilled a drink on the man.
The suspect left but returned about 30 minutes later and he was livid, the woman said, adding that he was screaming death threats.
Pasadena Police are investigating, and have asked that anyone with information on the suspect in the video to call them at 626-744-4241.