Sometimes kids raise their hands and have completely off topic questions/responses, like this gal, whom we shall call Mustache due to her obsession with facial hair:
I am standing in the front of my room giving the students directions for the long term project I am assigning when all of a sudden...
Mustache raises her hand: Mr. Teacher, I found something out.
Mustache, very matter of factly: Mr. Teacher, I was driving one day............ and there were a bunch of cars going beside us along the freeway................. and we passed a farm. Did you know that there are cows on the farm? Do you know what sound a cow makes?
Me: Off topic.
The class starts giggling and it is everything I can do to get them back on topic. Grrrrrrrrr. And I have 10 other girls just like this! Gah. Ok... rant over... they're pleasant girls... but some days they drive me crazy.