history: I was at the grocery store the other day, waiting in line to check out. The person in front of me was very old and having trouble working their card. The cashier was very rude and condescending. While I was at the grocery store I was in line behind a nice_comma_ but very confused older person who had trouble getting their credit card to work. That can be frustrating. Did you do anything to help?
current: No, I thought the cashier was going to help her, but instead, she started getting very frustrated and began saying some very mean and ugly things to the customer. 
next: Oh that is terrible, cashiers should have more patience.