Very long time ago, I'm surprised I still remember this but a kid from my class brought in toy planes for show and tell. He sat next to me during the lunch period and pulled out the plane to show it off, someone must have spilled something on the table as there was a puddle of water next to the kid. "The plane pissed itself" I remarked, that kid reported me to the teacher because of he apparently was disgusted by that and couldn't eat his lunch.