According to Anthony Cardoza, the rabbit at the end was not scripted; a wild baby jackrabbit wandered into the shot.
Howard Morrison provided the Geiger counter. It was also used in Night Train to Mundo Fine.
Shot without sound. To avoid having to sync a lot of sound in post-production, the actors turned away from the camera when speaking, and cupped their hands over their mouths when shouting.
The rabbit scene was filmed by John Cagle.
Coleman Francis:
[coffee as calming influence]
The patrolmen relax by having coffee.
Coleman Francis:
[location]
Yucca Flats airstrip
Coleman Francis:
[location]
Yucca Mountain
Coleman Francis:
[props]
Light aircraft used to transport main characters
Coleman Francis:
[vigilante shooting]
Hank Radcliffe, the boys' father, is mistaken for the killer, shot from an airplane by police, and wounded.