8. (Back to the Future) How well do you remember the precise appearance of someone you knew for a week thirty years ago, of whom there would be little photographic evidence. And anyway, how do we know the question is NOT haunting his parents? How much do you let your teenager know about his creepy resemblance to a kid who disappeared 30 years ago? We see them for about two seconds in the present when they would have known him, and after the last half a dozen years or so since he started to look like "Calvin" I would imagine they have either repressing their memory or hiding it from him down to a science. I would think the bigger question would be "How embarrassing was it when they heard about the hot new designer 'Calvin Klein' and they possibly tried to contact their old high school acquaintence to congratulate him on his success?"