My high school hunting buddy had a sister who was a prototypical airhead. One day we came in from working out on their farm with a goat horn which we found in a field. His (15 year old) sister saw it and asked what kind of a horn it was and my buddy very matter-of-factly replied that it was a unicorn horn, which we just got while hunting.

She was initially incredulous saying “no way” a few times, but as he explained (again in a realistic tone) exactly where in the mountains we got the unicorn and how we lured it in she slowly started believing we had just killed a unicorn, but then she probably saw me trying to suppress a smile, and realized she was being tricked and said there was no way she would believe we killed a unicorn. We laughed and fessed up and told her it was just a dumb goat horn we found in a field and she said, “I knew you guys wouldn’t kill a unicorn.... cause aren’t they almost extinct?”

She still hasn’t lived that one down 20 years later.