I worked at Starbucks, and Black Friday there is a little scary.
Everyone at the mall was wanting to get coffee and get back to the lines for the big stores. I was the person on the door helping people stay in a semi-organized line as they rushed in.
These two middle-aged ladies were arguing about who got there first. Then they started pushing and screaming about getting back to Target in time.
Then crazy lady #1 takes a coffee cup off of the shelf and chucks it at crazy lady #2's head. Only she doesn't hit crazy lady #2, she hits innocent bystander #1 who retaliates by grabbing stuff off of the condiment bar a throwing it at both crazy ladies. This shortly becomes a free-for-all of people throwing stuff.
I, being pretty small and not willing to jump into a group of people chucking stuff, hid behind the counter with my coworkers and called security and the police. We let them sort it out, and ended up closing and serving coffee to the police and security guards while we cleaned up the mess...