Pink w/ Sky Blue Splatter. Catalog Number: 741869395257 Color: Pink Format: LP UPC: 741869395257 Twentieth Century Zoo are a quintessential representative of the psychedelic rock movement. The band's album Thunder On A Clear Day was originally released in 1968 on Vault Records, and captivates the psychedelic soundscape of the late 1960s. Bursting with raw energy and experimental fervor, this album delivers a sonic whirlwind of fuzz-laden guitars, swirling organs, and hypnotic rhythms.