Oh common guys, I can't believe you forgot one of the greatest opening sequences in film history: "Un Chien Andalou". The razor slitting the eye! 

Fellini's 8 1/2 also has a great beginning. i'm too sleepy to think of others now. Will post some more tomorrow.

i know this thread is long buried. but i discovered it today and found "Un Chien Andalou" missing. so please bear with me 

M