I was a latchkey Gen-X. Once, as a young teenager, I was sure I witnessed a UFO landing in my back yard. It was night in the fall, and I was alone.I was alerted to a sound like a giant vacuum cleaner. I looked outside and saw smoke and a big machine with lights, either in my back yard or neighboring field. It crept closer, and spun around. My heart was racing.
Then I realized it was a combine tractor in the neighboring field, harvesting cross at night. The smoke was dust from the harvest. That's when I realized: Anything can be a UFO if you are bad at identifying things, and don't realize it's not flying.