When Del Tenney was going to show the film to executives from Twentieth Century Fox to see if they would pick it up, Tenney brought in some folks to wear the monster suits for promotion. One of the monsters was in the restroom when an executive from Twentieth Century came in. The gentleman freaked out at the sight of the monster, everyone had a good laugh about it, and Twentieth Century Fox released the film.
Though it has been stated that this film was a favorite of horror author Stephen King, the exact opposite is the truth. King actually called it "an abysmal little wet fart of a film."
Director Del Tenney said he kept the monster suits from this film for years afterward and wore them at parties for laughs.
Chocolate syrup was used for blood during the monster attack scenes.
Because of the film's low-budget, the 'car crash' between the two drunks was faked by sound effects and placing the cars at an angle to make them appear to be touching.
Richard Hilliard: the father watching the news report of the monster attacks on TV. Del Tenney's young son and daughter play the children in the scene.