"I. Am. A Robot."
Overheard: #2: (wailing at the top of his lungs and wearing his robot hat) "Push dah SWITCH!!"
#1: "I don't want to. So there."
#2: (almost indecipherable screeching by this point) "YES! YOU PUSH DAH BUTTON NOW!!"
#1: "Oh fine." (makes switch-flicking motion near #2's back) "There."
#2: (happy again -- starts marching around the room) "I. Am. A Robot. I. Am. A Robot. I. Am. A Robot. (...)"
#1: "You. Are. A Goofus. You. Are. A Goofus."
Both kids collapse into piles of giggles.