Rousey, who is guest-starring on the Fox drama as a firefighter, was filming a scene in Mexico last week when she accidentally slammed a door on her fingers during a dramatic action moment, reports TMZ. Rousey broke her middle finger and her tendon was nearly severed. She also fractured the tip of her ring finger. "She was taken by ambulance to a San Diego hospital for treatment where we're told her middle finger was repaired with a bolt and screws," says TMZ. "The craziest part ... RONDA WENT BACK TO WORK THE NEXT DAY!" TMZ adds that Rousey didn't acknowledge her injury until the director yelled "Cut!"