When the promoters were negotiating to get
The Grateful Dead to perform at the festival,
Bill Graham, who was managing the band at the time, insisted that the promoters include one of two other acts he managed on the bill.
Michael Lang listened to recordings of both bands and liked both bands so much that he couldn't decide which one to put on the bill and wound up flipping a coin and the winner would be booked. The losing band was
It's a Beautiful Day. The band who won the flip was
Santana, who would achieve super-stardom on the basis of their appearances at both the festival and film as well.
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