In the scene where April (Brittany Allen) is speaking with her father during a Skype call, on her desktop you can see a pirated copy of Grave Encounters (2011), which is the The Vicious Brothers first movie; The Vicious Brothers being the makers of this movie.
There are actors in extraterrestrial that were in the Vicious Brothers film Grave Encounters. Sean Rogerson and Mackenzie Gray (plays the smoking man right at the end of the film).
Shot in twenty-one days.
The original title for this film was "The Visitors."