There was an article in the Herald at the weekend that showed that reports of UFOs are usually explained by secret military trials, and that fighter pilots, even female ones, are more aware of what today's technology can do so they are more likely to be surprised by erratic flight paths and speed than your average joe.
I read last week about a professional cyclist who specialised in long, difficult routes. He gave a detailed and convincing description of how he had been abducted and taken away by a group of aliens. Turned out he was exhausted and dehydrated and was hallucinating, The Aliens were his support team.