Kevin: [pointing and laughing at a kid near us who somehow managed to get his bowling ball stuck in the gutter DESPITE having the bumpers up]
Amber: [whispers] Don't do that! He's mentally handicapped.
Kevin: Oh my gosh! I didn't realize! Whoops!
Amber: I'm just kidding, I was trying to make you feel bad.
Kevin: [swats at Amber] Ugh, you're horrible, I believed you!
[a few minutes later]
Amber: You know, I think that kid is actually mentally handicapped after all.
Kevin: I was just starting to realize that myself…
(Moral: don't call someone mentally handicapped because they might actually be mentally handicapped.)