Locke and Michael banter in the hatch and silent movies are mentioned.
Quote:
[We
see the combination to the gun vault being opened (using the numbers 25
& 29) by Locke. Locke opens the vault door and starts using a
screwdriver on the other side of the lock.]
MICHAEL [entering]: You breaking in or breaking out?
LOCKE: I used to love those old silent movies
where the robbers would crack a combination lock with their ear pressed
up against the safe. And the money they stole was always in a white bag
with a big dollar sign on it.
MICHAEL: Silent movies, huh? You're not that old, man.
LOCKE: I'm old enough.