Who are you?

In a convenience store, a man in a black shirt and white pants holds a larger man in a beige shirt and white pants in a tight embrace, pushing him backward toward a refrigerated beverage case while a security guard in a dark uniform stands nearby observing. The man in the black shirt repeatedly pushes the other man's head into the glass door of the cooler, causing the man in beige to recoil slightly each time, before the man in black turns and walks away, leaving the man in beige stumbling backward.