 their house had poltergeist phenomena. The clothing was taken out of the closet. Clocks would stop and start mysteriously. Time settings would change. Wash-a-water faucets would turn on when no one was home. So there's a pronounced paranormal dimension to both the Kenneth Arnold case and the beginning of the abduction cases, the Betty and Barney Hill case. So if it's extraterrestrial, it is also paranormal.