Journey into Unknown Worlds #20

In "Bwana Brown!" from Journey into Unknown Worlds #20 (1953), a member of the Explorer's Club stuns his peers by refusing to reveal the location of a mysterious African tribe known to reward immortality with gold and diamonds. When a rival hunter tries to kill him with a spear and steals the map, Bwana Brown calmly observes the consequences—without revealing whether the tribe’s test is real or a trap.

In "The Son of Rasputin," a man's chilling experiment in Pavlovian conditioning takes a deadly turn when he trains his beloved actress to shoot his rival at the sound of a bell. When a fire breaks out in his home, the same conditioned reflex triggers her to open fire on the arriving firefighters—leaving him to perish in flames.