This is just another exploitation movie of youth culture made at that time (1964-1970) by this great little company American International Pictures. But not the best. Very thin story that is a pretext to put on psychedelic special effects. Today, they seem very old and boring, and the music isn't great at all, not representative of the real psychedelic rock music. It could have been a lot better with the same idea. But this film had got very fine editing, years ahead of what would become music clips in the 1980's. But I got three big thrills with this movie. One : to know that Jack Nicholson wrote that! Two : to see Peter Fonda on acid in a laundromat. And three : when Fonda comes into his master-LSD house, I'm sure that we can see Jerry Garcia of the Grateful Dead! Or is it hallucination?
