5. West Side Story - Zombie Horror
https://www.youtube.com/watch?v=x25jVzVP1bY Until you've watched this trailer, you might not understand how anyone could transform one of Hollywood's most beloved musicals into a gritty tale of survival horror, without the use of any exterior clips. This short but effective trailer manages just that though, using clever cuts, effects and sound editing to make West Side Story look like the grittiest thing this side of 28 Days Later. Tonight in America, don't Feel Pretty because Something's Coming.