Must Watch:
Dark Knight - personal favorite and the best superhero flick
Pulp Fiction - Tarantino's magnus opus
Matrix - one of the most revolutionary films that captured the world's imagination
Sin City - shows what one could do with a visual medium such as film and it's also pretty freakin' awesome
A Clockwork Orange - one of Stanley Kubrick's best and its themes and messages will make you think
Don't Watch:
Armageddon - michael bay
Borat - very hit or miss comedy
Jumanji - meh
Matrix Reloaded - the sequels ruin the experience of watching the first
Matrix Revolutions
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Black Turtle
all you need