Casey Kasem said that he always tried to play the voice of Shaggy on Scooby Doo as a beatnik who had just recently come down off of a acid trip. He drew on his own personal experiences as one of Ken Kesey's Merry Pranksters. He was scheduled to go on the cross country trip that was chronicled in Tom Wolfe's book The Electric Kool-Aid Acid Test but was arrested for public drunkeness and lewd behavior two days before the trip left.