* TheDanza: The three main characters share their names with their actors.
* EnforcedMethodActing: The actors were screened for their improvisational ability, and given a 35-page outline of the movie. All dialogue was improvised. The directors began rationing the actors' food to make them as hungry as their characters. They were not told when strange noises would be made, or when the tent would be attacked. Makes for some great acting.
** Pay attention to Heather's screams at the end; according to the directors, she wasn't acting, and was.freaking out for real.
* TheRedStapler: Burkittsville, MD, a quiet little town of less than 200 people, was flooded with tourists after the film's release. The residents of Burkittsville were not happy.
* ViralMarketing: Including a [[http://www.blairwitch.com/ decently designed website]] that's still up as of October 2014.