Cosmic Saboteur by Frank M. Robinson

Stan ran to the other window and stared at the street below. It didn't seem any different than when he had come in a few minutes earlier. The wide boulevard of stucco houses, the shade trees and the lawns. And a few of the apes on the sidewalk, hurrying to work.

Only they weren't hurrying, he noticed after a moment. One man was halfway down the house steps across the street, a brief case under his arm. But he wasn't moving. He was frozen in mid-air, off-balance, one foot halfway down to the next step. A housewife had stopped in mid-stride two doors down, her shopping bag swung forward at an awkward angle. At the corner, a small Renault car was poised in the middle of the street, caught in the process of turning.