Anyone watched Crank? Although the movie sucked, the camera/special effects work was very trippy.
It’s been a while (10+ years) since I’ve seen it, but Fantasia always struck me as a bit loopy. Isn’t there a bit with hippopotamuses (hippopotami?) in tutus dancing in a fountain?
Altered States
Jacob’s Ladder
The Doors
You thought so? My husband and I loved it. It was exciting and unpredictable and we had a great time. But then, we also loved Alpha Dog and Smokin’ Aces, so we’re weird.
Yep.
Regarding the OP, I think 2001 takes it.
I watched Crank after watching a long run of Indie/Art films. Maybe that affected how I took the movie.
One of the most psychedelic movies I’ve ever seen (and one of my favorite movies of all time) was made long before the hippie era: The 5,000 Fingers of Dr. T, released in 1953.
You can watch the trailer here.
You need to be a member to see that. Out of curiosity, who will play Barbarella? I see Pam Anderson (although maybe more in her younger days.)
How about Jessica Simpson, the Pam Anderson of the 21st century?
Re. The 5,000 Fingers of Dr. T – I was thinking of the same thing! This is the only live-action movie Dr. Seuss (Theodore Geisel) designed the sets for. I love the boys’ beanie hats with the hand perched on top.
I can’t comment on Dumbo (1941) since it’s been probably 30 years since I last saw it, but I watched Fantasia (1940) as a sober college student and I can’t imagine any mainstream pic more psychedelic than that. It even has dancing mushrooms! 
But shouldn’t “psychedelic” encompass more than the signature LSD-style vivid, busy multicolored visuals, as suggested in this exerpt from the Wiki article on “psychedelia”? –
A psychedelic experience is characterized by the perception of aspects of one’s mind previously unknown, or by the creative exuberance of the mind liberated from its ostensibly ordinary fetters. Psychedelic states are an array of experiences elicited by sensory deprivation as well as by psychedelic substances. Such experiences include hallucinations, changes of perception, synesthesia, altered states of awareness, mystical states, and occasionally states resembling psychosis.
By that definition, **Altered States ** is totally psychedelic.
If the term can be stretched to embrace related modes of fancy, I’d give an “honorable mention” to the surreal and anarchic The Magic Christian (1969). This farce starred Peter Sellers and Ringo Starr and was based on a Terry Southern novel, and sports some arresting comedic visuals – the lighted sign that pops out after Lawrence Harvey’s striptease whilst performing the soliloquy in Hamlet; the sabotaging of the Ox-Cam crew race; Raquel Welch’s “Mistress of the Whip” slave-galley scene; the fancy restaurant scene (which prefigures the “Mr. Creosote” bit in Monty Python’s The Meaning of Life); the Rembrandt; the sexually suggestive waiters, and the affluent businessmen of London wading through crap [literally] for pound notes…
Speaking of Monty Python, their work always had a psychedelic edge to it, especially Terry Gilliam’s animation, but not limited to that. How about when Brian falls off the tower and is rescued by the alien spaceship? Very trippy, indeed!
How about “Waking Life”?
Then there was that movie by the Monkeys… HEAD…
The opening sequence itself was like 2 hits of orange barrel…
IMDB Link Head (1968) - IMDb
Regards
FML
John Ferren’s Nightmare Sequence in Hitchcock’s Vertigo (1958) was very trippy for a mainstream movie of that era.
The Fantastic Planet (La Planète sauvage) was a staple for the psychedelic crowd in the '70s.
The King of Hearts (Le Roi de coeur) isn’t so visually trippy, but the plot is.
Back in the day, both of these were must sees, when experiencing that special altered state. Of course, they were usually followed by Bambi meets Godzilla.
How about Queen Elizabeth II’s favorite film, Yellow Submarine?
My favorite double-feature: *Sins of the Fleshapoids *and Ascension of the Demonoids.
The Big Lebowski definitely had some trippy moments
You beat me to it. Moulin Rouge also has some trippy elements.
You have not yet experienced, I take it, The Three Caballeros. It involves Donald Duck trpping on mescaline and harassing Latin women.
My vote goes for The Trip, pretty much by definition. The whole thing is an acid trip.
Argent Towers covered Alice so I’ll vote for “The Cabinet of Dr. Caligari”(1920 version).