I used to to work as a security officer at the L.A. County Museum of Art. Celebs would visit the museum for special events, as guests of the curators, etc. But the visit I remember most was when Showtime came to the museum for a couple of days to film several scenes of the movie "Lush Life" with Jeff Goldblum and Forest Whitaker. They were shooting on one of the upper floors of the building I was patrolling, and after finishing up one of my regular gallery checks, I stepped into the building's elevator and inside was Forest Whitaker by himself rehearsing out loud his lines for one his upcoming scenes. He was so engrossed in getting his inflections just right, he didn't even seem to notice me standing next to him.