I used to be a cashier at a supermarket where I lived. In that particular area, people had a habit of buying meaningless stuff (like a pack of gum) and pay with large bills (over €50).

They did this because, for some reason, going to the bank was beneath them (someone said this to a colleague). This usually happened at the beginning of the month. Sometimes I would ask them if they didn't have a smaller amount and they would nod “no” while I could hear the change in their pockets

They also used to think that we had an unlimited supply of coins. Usually we would receive them every Thursday so when we were short, we would ask customers for spare change to make it easier (if the total was 11,80 and the person paid with €20 we would ask for 1,80 and then the change would only be €10.

That day, my supervisor had told me that we were running very low and it was almost closing time. Two guys bought a small item and paid with a 100€ bill. I asked them If they had a smaller amount. They said no. I explained that I would have to give their change in small coins. They insisted.

When I started counting the money they realised they would leave with handfulls of small change and said that they could pay with a smaller amount. Unfortunately for them, company policy prevented me from accepting money after the till was open (to prevent scams). The look on their faces when I deposited the mountain of change on their hands was priceless.