On the "Underground Passage" level, the second American mission, go down the spiral stairs and go through the door on the right. Clear out that room of Nazis and the next one past it. Then, go back to the middle room and clear it out again. Go to the walkway that has a field pack and a door. Throw two grenades at the door then go up to it and press Action. Note: You will not see an "Action" icon, but it does not work unless that button is pressed. Then, throw one more grenade at the door. It helps to throw it at the wall next to it so that it lands at the base of the door. This will blow it open. Go down that passageway to find the "creepy" room that contains a ghost baby in a crib, floating candles, a giant rat, a teddy bear, a "sticky" bear (basically a sticky grenade that you get 99 of), a flushable toilet, a MG40, and a Browning .30.