What if she refuses to leave?
If so, then she gets arrested. Bet that is what she did. She refused to leave without her Big Mac.
There is a point at which the Big Mac without extra cheese is not worth it. If a business is calling the police because you are acting like a dangerous fool to the staff, maybe you are the problem here.
I cannot imagine a McDonald’s refusing to remake your Big Mac. Seriously.
Did the cop lose his control? Yeah, might sure look like it. But, also back it up a bit and what was this crazy fool doing moments before? Acting so badly that the cops get called on her fool behind.
You give her the opportunity. If she doesn’t she’s made her choice. But 99% of people do choose to leave if you give them the opportunity to do if you reason with them a little bit. I have had to deal with these kinds of situations myself and most can be talked down if you take a bit of time to do so.
When people lose their minds over inconsequential things, it’s usually not the inconsequential itself that is setting them off but the accumulation of many inconsequential things and what they are losing their minds is just the last one they could put up with.