The cast on Amber Benson's foot is real. Shortly before filming, a landscaping mishap at home caused several fractures.
The original script followed Steve Railsback's character as he killed the teens, with strange and elaborate traps he set in the tunnel, to avenge his son's death.
Edward Furlong's pants didn't fit at first because the waist and inseam sizes were accidentally switched. The pants were too long, and too tight at the waist. However, they fit Paul Cram perfectly.