Well, it's lame now, but I'll start!
I thought it was hilarious when I first got into the Resetti Center, sat on the toilet, got up and it flushed. I don't know why now, but then I laughed so hard!
I know I have more and I'll chime in again when I think of some.
Oh...here's one! I just adopted Camofrog. Well, I got him from another player, so the first time I greet him, he says, "I moved here because you convinced me to. Now don't let me down, *very-filthy-word with a @ to fill in the bad letters.* I cracked up! And later he called me a "dirtbag."
Someone REALLY wanted him gone!