A friend of my aunt was going shopping at the mall, and stopped in a snack bar to rest her feet. She bought a Kit Kat bar, a candy bar which breaks into several pieces.
The place was crowded, so the friend was forced to share a table with a meek-looking gentleman. (That's just the way some malls are, I guess.) The expected business happened with the two of them sharing the Kit Kat, but since the Kit Kat had an odd number of pieces, she made sure she got the last one.
The man got up without saying a word, went over to the counter and bought a couple of donuts. The friend was working herself into a rage because this guy had eaten her Kit Kat. She imagined that he had bought two donuts to give one to her in apology, and so you can imagine how she got even more angry when he had the gall to go sit by himself at a table far away from her.
So, in the strength of her fury, she stalked over to his table, picked up one of the donuts, took a BIG CHOMP out of it, and set it back in front of him. Then she glared at him, said "And a VERY GOOD DAY to you, too!" and stormed out.
She got to her car, opened up the purse to get her keys, and you know the rest.