Their stage show is intense and their music is exciting but Beyoncé Knowles and Jay Z didn’t expect their fans to start eating each other when they took the stage in Los Angeles at the Rose Bowl over the weekend.

According to a report, Roberto Alcaraz Garnica (25) “groped a woman at the stadium” and when the lady’s boyfriend jumped in, Garnica bit off a chunk of his finger.

Of course, the police arrested Roberto and booked him on one charge of mayhem, though there’s no update on the fate of the victim’s digit.

Thankfully, Garnica didn’t cause any further trouble, as stars like Natalie Portman, David and Victoria Beckham and Nicole Richie were all in the house as well.