I had one old biddy give me the stink eye at a store once. I still find the situation funny.
I was buying 5 or 6 things (for something like 7 euros), and paying in 10/20/50 cents coins. I wouldn't have done that if it wasn't for the fact that here it's a machine that counts the coins, not the poor retail slave. Sure, it did take some time because you can't just dump the coins; they go in one by one.
The old witch behind me muttered something like, "grumble grumble some people have things to do grumble."
It made me smile because it was Tuesday afternoon, in an almost empty store. It's usually old people that take all the time in the world, making the rest of us have to wait while they dig for change at the bottoms of their purses.
Turnabout is fair play, and it's not like she was trapped at one register with no one else to ring her up. She could have very easily gone to the next register over if she truly was in a hurry to ring up her few items during the dead time. Instead, she just gave me a sour pickle look and muttered in complaining tones.