In Fear And Loathing In Las Vegas (1998) 51 Minutes In. The Author Of The Book Hunter S. Thompson Makes An Appearance As Himself In A Flashback In The 60s. This Occurs When Johnny Depp Walks In Slow Motion Through A Club Full Of Hippies, He Says, “There I Was. Mother Of God, There I Am!"
Another underrated Depp movie: The Ninth Gate
#29 Is also a Hunter S. Thompson adaptation, though no where near as good as Fear and Loathing in Las Vegas