A small piece of finger is not the typical souvenir from a concert, unless you attended Saturday night’s Beyonce-Jay Z concert at the Rose Bowl Stadium, the San Jose Mercury News reports.

Citing authorities, the news source says that the incident occurred when finger-hungry Roberto Alcaraz-Garnica groped a woman. Unfortunately for him, the woman’s boyfriend was nearby and began fighting with Roberto. During the fight, Alcaraz-Garnica allegedly bit off the man’s fingertip.

Although initial reports suggested that there was some confusion as to whether Roberto completely severed the man’s finger, photos obtained by TMZ reveal that man’s finger was indeed bitten clean off.

The San Jose Mercury News notes that Roberto was charged with mayhem and sexual battery and that his arrest was just one of nearly a dozen made at the stadium on Saturday night. Several people were also arrested for public drunkenness and scalping tickets.

Roberto is being held on $100,000 bond and may face further charges, as well as a lawsuit, CBS Los Angeles reports.