Maybe it's because I read that word like it's supposed to be pronounced ("shee"), that I don't think that's a good joke.
Sorry.
One that's kind of meta-gamey...
Had a player who had a Fighter, liked to rummage through my Monster Manual between sessions, comparing his strength to various monsters ("I'm stronger than that, almost as strong as that..." etc). Party encounters a Kraken in the Underdark. Fighter player says "Ooh, a Kraken! I'm almost as strong as that!"
I tell him, "Dude, a Kraken can snap you in half"
Wizard's player "Snap, Kraken, Pop!"