Heat: The 7.5 minute gunfight through the streets of LA
True Romance: Clarence (Christian Slater) visits Drexel (Gary Oldman) and when Vincent (Christopher Walken) visits Cliff (Dennis Hopper)
State of Grace: Final gunfight scene in bar The camera is great but the sound editing REALLY is the best.
Braveheart: The Battle of Sterling
Reservoir Dogs: Mr. Blonde (Michael Madsen) and Officer Marvin Nash ... "Hello, can you hear me?!"
There are MANY more but these are off the top of my head that stand out.
To be nobody-but-yourself -- in a world which is doing its best, night and day, to make you everybody else -- means to fight the hardest battle which any human being can fight; and never stop fighting.