Factual error: The cavemen Harrier pilots are shown using the hover mode frequently. Harriers, even with drop tanks as depicted in the film, can hover for at most 5-10 minutes, as the thrust required to keep the aircraft in the air without any lift consumes massive amounts of fuel and overheats the engine, and real-life Harrier pilots are instructed never to hover for long periods of time, unless absolutely necessary. The amount of time the cavemen spent hovering (hiding out of sight in a parking garage, sneaking up on the Psychlo gunships, etc.) would have easily caused their fuel to run dry.
Battlefield Earth (2000)
Ending / spoiler
Directed by: Roger Christian
Starring: John Travolta, Forest Whitaker, Barry Pepper, Kim Coates
The home planet of the Psychloes explodes after Barry Pepper and the other humans destroy the base where the Psychloes hang out. Terl gets his arm blown off and gets locked in a cell surrounded by gold bars in Fort Knox. Jonnie tells Terl that he finally has his gold and is using it for leverage. Ker joins the humans while Terl just stands in the cell all alone with his gold.
More mistakes in Battlefield Earth
Terl: Attention. This is Terl, your chief of security. Exterminate all man-animals at will, and happy hunting.
Trivia: John Travolta made the film with Franchise Pictures. A few years after the film, it was revealed in a court case that Franchise had fraudulently overstated the budget of Battlefield Earth by $21 million to scam investors. After losing the case, Franchise filed for bankruptcy, and Travolta fired his manager, who set up the deal with Franchise in the first place.
Question: Why are certain areas of the Earth irradiated? What happened?
Chosen answer: It is residual radiation from atomic weapons used in an attempt to fight off the Psychlos.