I'm at work tonight and I went down to the cafeteria for a Dr. Pepper and a piece of pizza for dinner. There was a doc in line paying, and he apologized for jumping ahead of me - I wasn't paying enough attention to know whether he had or not. In the end, he bought my dinner. I tried to give the money back, but he took it and handed it to the checker who took it, over my protests.
A nice little bonus on the day we re-arrange for the next phase of our lab remodel!