Other shoppers needed to get through the main aisle, but nobody in the self-checkout line budged. Trying to squeeze through, a woman clipped a man standing in line. He wheeled around and shoved her cart.
Somebody pushed him. Somebody yelled. Somebody threw a punch.
The self-checkout line broke up. Masked shoppers began running out of the store with items tucked under their arms. Somebody knocked over a clerk. A security alarm sounded.
The manager had to call the cops to restore order.