Stan Gordon has brought forth some interesting cases, which statistically speaking can be ignored. However, in the interest of being open minded and non-dismissive of seemingly honest people, I think it's first important to note the large body of evidence supporting an alien source for UFO reality. If you can get on board with that, the next thing to consider, is the oft reported "screen memories," of abductees. These are false memories planted by the alien visitors to obscure the real events that took place during the abduction. This is perhaps more likely than the Bigfoot being abducted too, and certainly more plausible than sightings of a real-life Chewbacca!
*NEW* STRANGE CASES OF MISSING PEOPLE 411 (2015)