I've seen Robin Williams on Clement in San Francisco. He looked... fearful. He had a weird, skittering walk. Either he was practicing for a role, or he's just insane for real.
I saw Jaime Gertz and Corey Haim at the Westwood premiere of The Lost Boys. She was hot, but he looked like he was heading for a massive, ego-induced fail, which happened a couple years later. Gertz showed up dressed like her character in the movie, but was otherwise incognito. Very cool. Haim showed up in a limo with a gigantic white duster, and a several person entourage. The manager of the theater ran out to greet him, very obsequiously. What a dork.
I used to know Quentin when he worked at Video Archives. It freaked the hell out of me when I was watching a video in my Kyoto apartment, and the clerk from my old video store was talking about winning the Palm d'Or at Cannes.