The plot was inspired by two earlier stories. The first, H.G. Wells' "The New Accelerator" (1901) about a scientist who develops a drug enabling him to move so fast that no-one can see him. From his viewpoint, everyone else is frozen in time. The second inspiration, a 1963 episode of "The Twilight Zone" titled "A Kind Of Stopwatch" in which an irritating little man is given a stopwatch which allows him to freeze everyone else in time while he cam move normally.
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