After reading some of the documented near misses, it seems like they might be hearing hummingbirds or something similar. It also seems strange to me that nobody has any "bullets" from these near misses. Many sound like they should have markings on the house, deck or dirt nearby, or pieces of the bullets etc recoverable... if the person is below the deck, that means the house is a couple levels above minimum, and there are no projectiles to be found or markings of it hitting something? hmmm..