Why did the woman remember James so well?

M: Do you know James? He is in your class．
W: Certainly, in fact, he was the first person I got to know in my class．I still remember the look on his face when he showed up late on the first day of school．

M: Oh, excuse me．I think there seems to be some mistake．I’ve been charged for two ice creams but I only had coffee．
W: Oh．you have? I’m sorry, sir．I’ll make you out a new check．
M: Thanks．