There is one story that happened during my internship a few years ago that had me laughing for a while.
I was working with a group of three 1st graders (funny how it always seems to be 1st graders!) We were sitting at a kidney-shaped table with me in the middle. Suddenly, Seth, who was sitting in between the other two boys, had this look of disgust on his face. "Ewwwww, Tracer farted," he said. Giggles from Tracer. I wanted to giggle, but held it together and said, "we really don't need to make a big deal out of that. Tracer, say 'excuse me' and we can just keep going with our work." Tracer politely excused himself and within about 30 seconds, Seth pipes up again and says to me with the most serious look and tone, "you might want to scooch over--it really stinks."