This might be one of those thing where you had to be there...
I was cruising a few months ago when it was still warm, with the windows down. I stopped at a light. This guy started getting all excited and says Dude your f______ car sounds so f__kin bad_55.
Now that doesn't sound funny by itself. The funny part is he had a car full of small children maybe 4-7yrs old (who tend to repeat anything they hear).
I just thanked him and started laughing as i pulled away.