From Letters of Note:
On January 22, 2001, Hunter S. Thompson sent the following expletive-filled fax to Holly Sorensen, then ‘Production Executive’ at indie movie studio The Shooting Gallery. The furious written rant concerned the movie adaptation of Thompson’s novel, The Rum Diary, to which Sorensen’s studio had acquired the rights. Progress had been slow and confused on their part; so slow in fact that Thompson had reached boiling point.

This letter never fails to crack me up. Have you ever read his cover letter he sent to the Vancouver Sun when he tried to get a job with them? It’s pretty much the best thing I’ve ever read:
http://boingboing.net/2010/10/05/hunter-s-thompsons-1.html
I typed that up, and wrote the intro, for The Vancouver Sun
My literary hero.