I think I've heard a story sorta like this before. Weir and Jimmy were jamming together at montery pop backstage. He invited him to come sit in with the boys. Jimmy didn't show becuase he was the next band to play or something like that and later in 69 (I think) jimmy came to a show with guitar in hand ready to sit in. The boys were so gone on lsd they took before the show that they totally forgot that he was there until after they finished their second set. they went to find him and he was gone. Atleast I think that is the story I heard years ago.

