Old punctuation joke (and I mean REALLY old):
The teacher asked the class to name words that were very exciting.
"Firetruck", says Johnny.
"Burglar alarm," says Suzie.
"Tornado", says Bobby.
"Period," says Tommy.
"Period?" the teacher questions. "How is 'period' an exciting word. It's just something you put at the end of a sentence. There's nothing exciting about the word period."
"Yeah, I didn't think so either," says Tommy, "But yesterday my sister said she missed one and my mom started crying, my dad got out his shotgun and the boy next door left town."