Clint Howard screamed and yelled at the top of his lungs while driving in a car every day to the set in order to have a more gravelly voice for his role as Gregory.
This movie was sponsored in part by the Converse shoe company. Many characters wear Converse shoes, especially the classic Chuck Taylor All-Stars. There is also an extraordinary number of shots of shoes throughout the entire film.
Mashed potatoes were used as a substitute for ice cream in a lot of shots.
Adult film star Tori Welles, credited as Britannica Paris, is the woman in the supermarket asking Gregory about lipstick. According to the director's commentary, she was director Paul Norman's wife at the time, and they wrote that little scene for her because she wanted to be in the film.