SANTA ANA (CBSLA) — A Denny’s restaurant in Santa Ana unknowingly became a concert venue complete with a mosh pit.

The concert ensued when a 17-year-old rented the banquet room for a birthday party.

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The manager of the Denny’s apparently had no idea a punk band would be playing inside of the restaurant.

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As the crowd and the music grew, a mosh pit formed and the restaurant was trashed, leaving the 17-year-old with a hefty bill.

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The band was said to have started a GoFundMe to help raise funds to pay for all of the damage.