#8: Johnny Got His Gun (1971)

This is probably the most psychologically disturbing movie on this list.  In terms of gore and action, there is not really that much.  The movie is an anti-war film made in 1971, based on the 1938 novel of the same name by anti-war writer and activist Dalton Trumbo.  It is about a World War 1 Soldier named Joe Bonham who is hit by an artillery shell resulting in a total loss of all his limbs, and his face.  Joe manages to survive this ordeal, and is therefore kept alive as a medical curiosity by U.S. Army doctors, who assume wrongfully that the nature of his injuries have caused his brain to die as well.  Unbenownkst to anyone, Joe's mind is alive and well, but with no way to communicate to the outside world, he has no choice but to retreat into a world of memories, where he does not have to deal with things such as the giant rat shown gnawing on his stumps.  This movie was also the inspiration for the Metallica song and video "One", the first track on "Injustice for All."

#9: Trash Humpers (2007)

Trash humpers is a stupid movie.  Probably the stupidest movie that I have ever seen.  Undeniably, though it is very weird.  No one who has seen it can deny that.  If it was even creative in the slightest, I would have placed it higher on this list.  The fact of the matter is that it's just retards humping trash cans for 2 hours, and the worst part is that it won the DOX Award at the Copenhagen International Documentary Festival.  If you've seen 5 minutes of Trash Humpers, you've essentially seen the entire movie.  I sat through the entire 2 hours.  Afterwards I thought to myself, "Well, that is 2 hours of my life that I can never get back."

#10: Eraserhead (1977)

Probably the most well known of all the weirdest directors, David Lynch set the bar high for himself when he made this movie.  It took 5 years to produce and destroyed his marriage in the process.  At the end of the day, it's actually about the strength of a father's love, but the trick to understand that involves actually watching the movie!  Between the horrors of his inudstrial surroundings, his nightmarish relationship, and the screams of his mutant and eraser-shaped-head mutant-child, the saga of Henry Spencer is not likely to make anything but the strongest impression on its viewers.

#11: May (2002)

May Dove Canady is a weird, unpopular kid who has a lazy eye.  The troubled childhood she suffers as a result is the cause of her creating her only friend, a glass encased doll named Suzie.  Her mother tells her "if you can't find a friend, make one."  This advice is taken literally by May, who spends the later part of the movie removing all the "perfect" parts of her friends and then sewing them into an upgraded friend, the Frankenstein-esque Amy.  To bring Amy to life she gouges out her lazy eye and inserts it into her beloved creation, bringing her to life as the credits roll.  I found myself, in spite of it all, to be strangely attracted to May.  Not altogether surprising, hopefully to the composer of this list. 

#12: Jacob's Ladder (1990)

In this film, a Vietnam war veteran named Jacob Singer (played by Tim Robbins) is finding his life become a series of unending nightmares.  As a result of being administered a mind control drug referred to as "Ladder" during his tour in Vietnam he starts having flashbacks of a terrifying and potent nature.  The movie opens with Jacob and his soldier buddies sitting in the Mekong Delta smoking a fat joint.  It is implied that that is how they got the drug.  Anyways, the enemy attacks, the whole troop goes crazy, and they basically start tearing each other to pieces.  Jake takes a bayonet in the guts and the movie flashes to his adult life in NYC.  I tried to watch this film on acid at a friend's house in '98.  A group of us tried to watch it and we got just about to the part with the creepy old lady on the subway before we shut it off.  In any case, Jake gets the job as a postal worker and marries a demonic mexican.  He finds himself being attacked by malevolent and strange creatures who seem to be in some way connected to the government and the drug given to him and his buddies in Vietnam all those years ago.  This movie has a surprise ending which I do not wish to give away, and to describe it further would be to risk that.  What I can say for sure is that I do not recommend watching this movie on acid.  The events of this movie are partially modelled on reality.  The CIA did a series of experiments very similar to this called MKUltra in the 1960s.

#13: Subconscious Cruelty (2000)

This movie sets its own limits and then succeeds in breaking them.  An ambitious project.  The main character is attempting to transform himself a la Dostoyevsky's Crime and Punishment by committing himself to the creation of the most sublimely terrible act of which he can conceive.  He will murder a woman who's just given birth - but not before he kills the baby right in front of the young mother's eyes.  This culminating event actually serves only to introduce us to the realm of the truly surreal. 
There comes a point in these sort of movies where explanation runs dry, where language itself becomes a barrier.  Some things are too strange to be adequately described, like a strong LSD esperience.  The director (Karim Hussain) did an excellent job of spotting that key moment in Subconscious Cruelty. 

#14: Un Chien Andalou (1929)

Produced in 1929 by the father of surrealism, Salvador Dali, Un Chien Andalou (The Andalusian Dog) features a dream-like sequence in which a woman's eye is slit open - juxtaposed with a similarly shaped cloud obscuring the moon, which is moving in the same direction as the knife's through the eye.  This grabbed my attention quite fast, and I found the literal exhibition of the French phrase "ants in the palms" (meaning that someone is itching to kill) to be creative in the most disturbing fashion.  Whether or not the movie actually means anything or even has a plot is a matter of personal opinion.