The Incredible Shrinking Man

Robert Scott Carey and his beloved wife Louise Carey are spending vacation on the motor boat of his brother Charlie. When Louise goes to the galley to bring a beer to Robert, he is engulfed by a weird mist. Six months later, Robert is sprayed by insecticide and when he goes to the doctor for the routine medical examination, he realizes that he had become shorter. Then he goes to a laboratory to be examined by scientists and they conclude that the combination of the mist with the insecticide has caused the effect.