Anything you can Do by Randall Garrett — Read

The image of the Nipe on the glowing screen was clear and finely detailed. It was, Bart thought, as though one were looking through a window into the Nipe's nest itself. Only the tremendous depth of focus of the lens which caught the picture gave the illusion a sense of unreality. Everything -- background and foreground alike -- was sharply in focus.

The Nipe moved in slow motion, giving the watchers the eerie feeling that he was moving through a thicker, heavier medium than air, in a place where the gravity was much less than that of Earth.