I was in a restaurant in Cape Town, South Africa with my family. Our waiter came to introduce himself. He said: Hello, I´m Slow and I'll be your waiter. My husband thought it was a joke so he asked him: "oh! really you are slow?" and he answered very serious, yes sir - I am Slow -
I was so ashamed, and my husband just didn't say anything else.....
A moment later we saw our waiter passing through so we asked for the bill, and he said: Sure, who was your waiter?
We were like: You!! you were our waiter! and when we see his apron we read: FAST.
We were like: wait! what! and he laughed....and then he called his twin brother "Slow".