I was working on an evening shift with a colleague who was on her first day. This happened 10 years ago, when we used to write down reservations for computers manually. The customers would often ask for a “PC appointment”.
A small boy came to the counter asking to use the toilet. My colleague misheard him and replied that there were no free slots left for that evening but that there was one the following day between 5 and 6 in the afternoon. The little boy's lower lip began to flicker.