A group of people were at Chuck E. Cheese in Parma, Ohio for a kid's birthday party on Sunday night, and tried to take a photo in the photo booth. When it didn't work one of the women complained to a manager, and he kinda blew her off.

That upset her and it was on!

A group of guys from the birthday party followed the manager into the kitchen and started beating him and his staff UP.

Six staff members wound up injured, including two who were seriously hurt and all of the guys who attacked them ran away before the cops got there. The police are using surveillance video to try to identify them and track them down.