Someone I know sparked some conversation with me, it started rather off-topic but he told me about some guy who goes to college debates to make fun of evolution. His favorite "point" was that if we came from "monkeys" why don't we have tails? As it would be helpful to use a tail like an extra arm. While I didn't mention that only New World Monkeys have talented tails, I did counter his argument without him seeing it coming.
Debating is always easy when the person drops their guard out of ignorance of which side you fall on. I told him that evolution isn't about convenience, strength, or intelligence, but adaptation. I cited cockroaches as an example, as they have existed before mankind (Triassic) and will exist after we are gone because they can survive (as a species) almost anything. He said that cockroaches have never really changed (though not entirely true as there are many types of them), and I said exactly as they had basically perfected adaptation. He offered no counter-point after that.