Context – this isn’t a question about the existence of extraterrestrial life, I firmly believe that were not alone in the universe simply due to the overwhelming size of the universe.
However when you hear tales of being abducted by aliens they all follow a pattern
Darkness to sudden blinding light (birth or csection) tall grey figures with large heads (babies only see in black and white for the first few weeks, large heads (possibly emulated by theater caps), being unable to stop them from doing whatever (because you’re a baby and you’re weak)