In the part where Mel Gibson brings Julia Roberts back to his apartment, she asks him for some coffee. He gets the container with the coffee but can't remember the combination. Then later on after he starts to get emotional when she asks him why he has so many Catcher In The Rye books he suddenly remembers the combination, 4-23-12. The lock on the coffee , however, was a 30 mm Master Lock which only has dials that go from 0 to 9.