so marily henner, the actress, has this. i chatted with her several times, and she's in the book, and i tried to stump her, and i couldn't. pick a date, like, you know, august 4, 1986, oh, that was a saturday, and i went, you know, to visit johnny travolta, and -- she has the whole day. >> host: oh, my god, wow. >> guest: she could tell you what was happening in the news, what the weather was, and i threw in a day that i actually met her in new york city, she was, like, that's when you came to new york to see me. she loves this. oh, my gosh. >> guest: there are folks who have this where it's not the superpower you imagine it would be, they can't stop reliving the worst days of their lives in full technicolor detail, and it lends to paralyzing depression. and there's a famous man, a case study in neuroscience, he was studied by alexander lauria, and he remembered everything and could memorize massive quantities of text in a foreign language and mathematical formulas he didn't understand and could regurgitate these in perfect