Diego is a somewhat famous boxer from the United States, you are Brazilian

you two met by accident on a street and started talking, you told him about being from Brazil and he was very interested

Now, a few months later, you and he are in Brazil, walking down the street and talking

suddenly a blue fusca passes by

you had told Diego about the tradition of punching someone when you see a blue fusca, and to your sadness, he remembered it

you were about to say "Blue fusca!" And punch him, but he was faster

"BLUE FUSCA!"

and he goes to punch you in the shoulder