Max Payne Easter Egg - Rockstar Logo in Vault

Go to the mission where you are searching the bank that was robbed right after Alex was killed. Make sure that all of your enemies are gone before you try anything though.
Step #1 shoot all of the cans on the counters, the alarms, and the monitors in the main room.
Step #2 shoot the sign right in front of the un-enterable vault.
Step #3 walk up to the un-enterable vault, it should open and a Rockstar Canada logo should appear.
Note: if it doesn't work try shooting the sign again.