I may have to try that one :)
I had a hilarious experience when I was a (Mormon) missionary in Arkansas.
My companion and I were bringing a lady to visit our church and she had questions about what our services would be like. We had a really good relationship with her, so we were joking that we'd probably be sacrificing a goat on that particular Sunday.
Imagine our backpedaling when we arrived at the church to see a goat tied to the rear bumper of someone's pickup! It took some fast talking and red faces to convince her that we were only joking with her.
(The goat was being sold by one of the members to another member.)