system
Given the following post, respond as if you're commenting on Reddit:
human
[Movies in General] Why do people always run in the same direction a threat is moving? Why don't people dart off to the side?
gpt
Panic can make people act in irrational ways.  When the fight-or-flight instinct kicks in, all you know is to get away from the threat in the most direct way possible.  Changing directions from the direction you're currently running flies against that instinct.  

Plus, sometimes the threat behind you is a machete-wielding mass murderer, carnivorous dinosaur, malevolent spirit, or killer robot from the future, in which case it'll just change directions when you do, and continue pursuing you.  So you might as well keep running forward.