hehehe
I've got another one just like that, but it's a little bit x-rated (warning! warning!). This friend of mine once went out with a Japanese girl, and in Japanese "hai" means "yes". Well she was saying "hai, hai" throughout the process of love-making ... and this freaked him out because in French "aie" (pronounced just about the same way as "hai") is an interjection that means "ouch" (as in "ouch that hurts").