When a house full of dwarves starts singing Misty Mountain, it's perhaps the saddest moment in the new Hobbit flick. Partly because of the effect of so many little dudes singing in such deep voices.

So nerd vocalist Peter Hollens—who you may remember from his Game of Thrones theme—does a good job here with just... himself, layering multiple acapellas to achieve the same effect.

The Hobbit - Misty Mountains - Peter Hollens Acappella [YouTube]