Mike Austin crunched the ball 65 yards past the flag-stick at the goading of his playing partner at the time, to let one rip. You can read more about his feat in this article in Travel and Leisure Magazine.
You can also learn more about Mike Austin and his swing in the book: In Search of the Greatest Golf Swing: Chasing the Legend of Mike Austin, the Man Who Launched the World's Longest Drive, and Taught Me to Hit Like a Pro