In high school, we always had people coming in to talk about stuff. Drugs, fires, stuff like that. Once, we had people from the Good Samaritans in, giving a talk about suicide and such. Now, at the end of these talks, tradition was that the teacher would ask a pupil to say some words about how we're glad they came, that we learned plenty, yada-yada. So the teacher came and asked me if I could say something. So I stand up, give a few seconds to get the suspense built up, and say ... "Ta" ... and sat down. The teacher told me I was rude, but judging by the laughter, everyone else, including the speakers, thought it was quite amusing.
Now, if you'll excuse me, my cat has got stuck behind a plant pot.