Legendary Concerts on Instagram: "Carlos Santana’s performance at Woodstock in 1969 has become legendary not just for the music, but for the circumstances behind it. Santana has repeatedly explained that he unknowingly took LSD before going on stage, believing he was taking something much milder and not realizing the band was scheduled to perform so early in the day. By the time they launched into “Soul Sacrifice,” he was fully tripping, later saying his guitar felt like a living, writhing creat