After Mighty Joe Young , O'Brien struggled for years in low budget horror films. The Black Scorpion is perhaps the best of those.
Scientists discover caves in Mexico which are home to a race of giant man-eating scorpions.
The monsters escape to attack Mexico City. Science fiction thriller starring Forrest Tucker. Limited effects work by O'Brien. To save money, Producer Merian C. Cooper decided to use several of the jungle sets from King Kong for The Most Dangerous Game. Since the effects work in Kong were so time-consuming there were often peroids where the principal cast had nothing to do but wait while O'Brien worked on the animation.