10 Horror Movies That Made It Up As They Went Along (But Were Awesome Anyway)

Since the beginning of his career, James Cameron has proven to be among the most influential filmmakers, as well as one of the most adaptable. This is important since, without Cameron's ability to adapt, he would never have finished The Terminator, regardless of his talent.

During the production of this sci-fi classic, something went wrong daily, forcing the Canadian director to constantly scramble for a solution. Although Cameron intended to blow up a real truck for the climax, the producers refused him, forcing the crew to build a truck miniature at the last minute.

When Linda Hamilton and Michael Biehn were about to film the scene where their characters come out from under the bridge, Cameron noticed the forest was infested with flies. To get the scene done, he had the whole area covered in bug spray. Not only did this cause the flies to disperse, it left a hazy fog, which helped the scene look more atmospheric.

But another last-minute change the production was forced to make was the Terminator itself. Because the animatronic was so damn heavy, the titular villain could not walk straight.

By adding in a shot of the Terminator's damaged ankle, viewers completely understood why the killer machine moved in a janky motion. Not only did this addition fix a plot hole, it helped the story as well, since this was the first time the characters (and the audience) saw vulnerability in the T-800, proving it wasn't unstoppable.