In August 1969, John Sebastian made an unscheduled appearance at Woodstock. He traveled to the festival as a spectator, but was asked to appear when the organizers suddenly needed an acoustic performer after a rain break because they couldn't set up amps on stage for Santana until the water was swept off. Sources that have tried to reconstruct the Woodstock running order differ on the exact time and position of Sebastian's unplanned set, with some stating that he played on Saturday, August 16, immediately after Country Joe McDonald others saying that on that Saturday, Santana followed McDonald and Sebastian appeared after Santana;and still others, including McDonald, recalling that Sebastian actually played on Friday, August 15, at some point after Richie Havens opened the festival.