Someone at Turbine likes Silent Hill

Or perhaps vice versa depending on the date this was added into portal.dat

Exhibit A - Silent Hill 4: The Room - First encounter with the locked door: http://youtu.be/cTFGg7kiitk?t=7m22s

Exhibit B - Portal.dat (Use ACDatExplorer) - Listen/Extract ID 0A000507 under 0A - Sounds.

Where/when is this sound played in game? Sounds like something fitting of the Prodigal Shadow quest.