

British railway workers in Kenya are becoming the favorite snack of two man-eating lions. Head engineer Bob Hayward becomes obsessed with trying to kill the beasts before they maul everyone on his crew.
Practical Effects
Actual lions lunging at the camera—no CGI, just chaos
Production
The 3D system that launched a thousand headaches

Director
Arch Oboler
Trivia, insights & behind the scenes
This film's success triggered a 3D boom that crashed by 1955, proving audiences hate headaches more than they love novelty. It took 50 years for 3D to recover.
The 'Natural Vision' cameras were so heavy they required special rigs, and the heat in Africa warped film stock constantly. The technical nightmare basically invented 'fix it in post.'