In The Movie Pirates Of The Caribbean: Dead Man's Chest (2006), The Little Song „I’ve Got A Jar Of Dirt“ Sung By Captain Jack Sparrow Was Completely Improvised By Johnny Depp
That’s why the surprised reactions from the other actors are completely real
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