I was just listening to Iron Butterfly's Heavy, when I saw your comment: "The Dutch psych group Groep 1850 used the Iron Butterfly Theme on their second album, Paradise Now." I missed the reference. Which track on Paradise Now? I love that record - and the Iron Butterfly song - but I never put them together before. And I'm still struggling to. It's probably obvious, but I'm just missing it.
'Paradise Now': 2:15