I was teaching 4th grade math and the topic was how to distinguish between a multiplication or division problem... After reading the problem together I asked, "Now what would you do this this kind of problem?" (expecting someone to say "multiply!")
A little boy named Demetrius raised his hand, "Whip it."
Demetrius: "Whip it good."
At this point I realize he's quoting the 80's song... "when a problem comes along you must whip it" It's by Devo, I think?
So, I'm cracking up laughing, and I ask him, "How do you even know this song?? It came out when I was born!"
Demetrius: I watch "Whatever Happened to...?" on VH1.
I was surprised when one of my Biology students asked:
"Mr. Westbroek, if Boys do not give birth why do they have belly buttons?"
I thought on it for about 10 seconds (mainly to gain composure) then responded
"That's a great question - the bell's about to ring now. We don't have time to go into detail. If you want to drop by after school, I'll be happy to discuss it more with you."
You should have seen the shocked looks on the rest of the class when I gave that answer! Priceless!!!