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This brilliant 'Making of Silent Hill' movie was graciously provided by our own Marchello (Oddish). Praise him.
There are no real spoilers in it, I checked. There are quite a few things that haven't been revealed in the trailers though, and this video does sacrifice a few of the 'surprise' elements of the movie. Still worth a watch before or after you've seen the actual film.
Pyramid Head appears in this numerous times, and both the way he looks and the sound he makes are 5-alarm awesome. He sounds like a demonic didjeridoo.