"And now for something completely different"... Zardoz (1974)
I didn't mean to begin with a Monty Python quote but they were Brit contemporaries of Writer/Director John Boorman. And Zardoz (1974), the follow up to his most enduring classic (Deliverance, 1972) might be better if it were aiming for comedy instead of merely conjuring laughs. Nevertheless it doesn't get any more "different" than John Boorman's bizarre drug trip about false gods, immortal hippie communes, sentient crystals, marauding assassins, chest hair, and Charlotte Rampling's unique power to both cause erections and lecture about them simultaneously.
I chose it for Best Shot only to finally make sense of its frequent meme-ready presence online -- the jokes on me as it will never make any sense -- but I don't regret it. It's too weird to go unseen. It's the only movie in existence that begins with a floating disembodied head spewing out firearms, the only movie where you'll ever see Sean Connery licking another man while wearing a red diaper, and the only film to demonstrate the potent psychic peer pressure of jazz hands.
"Meditate on this at second level" with us after the [NSFW] jump...