Too many to choose from

Jaws - "You're gonna need a bigger boat"

Godfather part 2 - Deniro killing the don whilst the light flickers

Crash - The scene with the little girl, the locksmith and the arab fella, VERY powerful scene. Probably one of the most powerful in cinema.

Crash again - The actual 'crash' scene

Last of the mohicans - hawkeye rescuing madeline stowe god knows how many times. Music is awesome

Raging Bull - The "you fuck my wife" scene...actually pick any scene from this awesome masterpiece.

So many to list