Horror music in major key

It's no secret that one of the key elements of any good horror movie is the music. Nothing builds suspense like a long, drawn out note and nothing makes you jump out of your seat like a sudden blast of noise. But what happens when you make a small change to the music, like playing a theme in a major key? Does it still deliver the same punch? 

When these classic horror themes are changed, they go from being the song of your nightmares to a barely recognizable tune that sounds more like an 80's tv theme. Now someone just needs to play some classic children's movie themes in a minor key and see how scary it can be.