Weirdest films ever?

This is my running list of the strangest films I have seen (and managed to write down). This list is by no means exhaustive, so please feel free to add to it!

For list formatting purposes I don't lead with A, An, or The. An example: Fall, The (2006)

Altered States (1980)
Aria (1987)
Bad Boy Bubby (1993)
Black Moon (1975)
Blood Tea and Red String (2006)
Blue Velvet (1986)
Boxing Helena (1993)
Brazil (1985)
Cabinet of Dr. Caligari, The (1920)
Clerks. (1994)
Clerks II (2006)
Cowards Bend the Knee (2003)
Crash (1996)
Delicatessen (1991)
Dogtooth (2009)
Dreams That Money Can Buy (1947)
Elephant Man, The (1980)
Even Dwarfs Started Small (1970)
Fall, The (2006)
Faust (1994)
F for Fake (1973)
Freaks (1932)
Funky Forest - The First Contact (2005)
Gozu (2003)
Grizzly Man (2005)
Gummo (1997)
Holy Mountain, The (1926)
In My Skin (2002)
Kamikaze Girls (2004)
Kids (1995)
Last Wave, The (1977)
Li'l Quinquin
Liquid Sky (1982)
Lost Highway (1997)
Love Serenade (1996)
Lucio (2007)
M (1931)
Marat Sade (1967)
Meet the Feebles (1989)
Muriel's Wedding (1994)
Naked Lunch (1991)
Picnic at Hanging Rock (1975)
Rabbit a la Berlin (2009)
Rubber (2010)
Saragossa Manuscript, The (1965)
Sick - The Life & Death of Bob Flanagan, Supermasochist (1997)
Slacker (1991)
Sonic Outlaws (1995)
Spectres of the Spectrum (1999)
Spirited Away (2001)
Stalker (1979)
Survive Style 5+ (2004)
Sweet Movie (1974)
Talk to Her (2002)
Thing, The (1982)
Three Burials of Melquiades Estrada, The (2005)
Topo, El (1970)
Tribulation 99 - Alien Anomalies Under America (1992)
Trouble Every Day (2001)
Tuvalu (1999)
Uncle Boonmee Who Can Recall His Past Lives (2010)
Videodrome (1983)
Visitor Q (2001)
Waking Life (2001)
Welcome to Woop Woop (1997)
WR - Mysteries of the Organism (1971)
You, the Living (2007)