When you purposefully corrupt games, if you're lucky, it turns into something resembling a nightmare. An absurd nightmare full of glitches, that is, not a terrifying one.
So what happens when you corrupt a survival horror game like Silent Hill? Well, judging from this video by AgonizedCandle, it stops being so dang scary. Actually, it becomes kind of hilarious. Observe:
Silent Hill Corruptions [AgonizedCandle -- Thanks Stephen McKeever!]