A long time ago (before Internet gambling), I remember reading in Reader's Digest about a professional card player with a photographic memory who got caught in a tragic casino fire. In the article, it said that since the fire, he'd been unable to enter any casino because his photographic memory brought back the scenes of the fire vividly into the present.

I also remember the hypnotist at my college orientation who hypnotized a bunch of our class. He had a couple revert to kindergarten memories, telling him who sat where in the classroom, who their friends were. In the most memorable sequence, however, he asked a guy in childhood mode the question 'did you ever make a special sound'. The guy/kid was shy and said 'yes but I'm not sure I want to do it.' Eventually, the hypnotist coaxed and encouraged the guy/kid enough ... and the guy/kid did the most spot-on, uncanny, loud Chewbaca roar. He got the nickname Chewy around campus after that.