It may have been a staged question? Which is easy to do, just get a freind to ask a specific question, fairly vague but answerable, that will end up helping to sell the coin by making it "sound" authentic. Ribbit
Q: So if you drop the coin on a table but there is nobody around to hear it, does it make a sound? A: Absolutely. This coin is 100% guaranteed to make a sound regardless if anyone is there to hear it or not.