Are caterpillars good to eat?
Johnny: Daddy, are caterpillars good to eat?

Father: Have I not told you never to mention such things during meals!

Mother: Why did you say that, Junior? Why did you ask the question?

Johnny: It's because I saw one on daddy's lettuce, but now it's gone.

747 Full of Lawyers
Q: Hear about the terrorist that hijacked a 747 full of lawyers?

A: He threatened to release one every hour if his demands weren't met.