When a horror film sports the tagline "Based on a true story" or "Inspired by actual events," the terror quotient almost always goes up, and the films often does big box office numbers.
One of the key components to a successful horror film is a memorable monster. But these monsters are a little more "out there" than most.
The classic sci-fi / horror tale The Blob is about a gelatinous ball of goo that consumes everyone it can, growing bigger and hungrier as it does. It's a pretty out-there concept, so you may be surprised to find out that The Blob is based on a true story.
Today we take a look at twelve horror films that were well on their way to being remade... but somehow ended up getting spared.