A disturbing video making the rounds on social media shows a woman getting knocked unconscious during a recent concert at the Rose Bowl.

Fans at a Rufus Du Sol show were horrified when a man began pummelling a woman and her friends at the stadium in Pasadena, Calif. — all of which was captured on camera.

Shelby Elston, from Phoenix, Ariz., said she blacked out and woke up in the venue’s medical tent, according to a Facebook post.

The mother of three said it all started when her fiance accidentally spilled his drink on another concertgoer. That guy stormed off but returned shortly after, screaming death threats.

Elston said she got between the two men in attempt to stop it from escalating, but soon became the victim when the man knocked her into the bleachers and hit her repeatedly — ev

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