George: Here's what we know so far: you can jump just over a quarter mile in a single leap.
Jim: A single what?
George: Fine. A single bound.
A reference to the famous line describing Superman, who can leap tall buildings in a single bound. It originated in the 1940s radio show and was carried into the 1950s television show The Adventures of Superman, in which the announcer said at the beginning of each episode: "Faster than a speeding bullet! More powerful than a locomotive! Able to leap tall buildings at a single bound!"