Trivia: The scene in which the blue car does several flips on the grass would later be used in the first season of the TV show "The Fall Guy" starring Lee Majors.
Trivia: Deputy Dave is played by Wes Bishop, one of the writers of the movie.
Trivia: At the very end of the film, the flame around the RV is in the shape of a coffin.
Trivia: When the RV pulls into a gas station towards the end of the film, the gas station attendant who serves them is the film's director, Jack Starrett.
Trivia: During filming of the scene where Frank and Roger battle with the rattlesnakes that were placed in the RV by the cultists, the snake urinated all over Peter Fonda's shirt when he picked it up.
Trivia: Executive producer Paul Maslansky has a cameo role as a road worker in a cowboy hat.
