Okay, I was at the airport the other day and was thinking about this.
Let's say it's 1,000 feet between Concourse A and Concourse B. If I take the moving sidewalk, have I still walked 1,000 feet? If not, did the moving sidewalk actually shorten the distance between concourses? And wouldn't that qualify as a space-time warp?
If so, it would be extremely cool to change the signs and have a recorded voice come on over a flying saucer type noise that says, "You are now entering the Hartsfield-Jackson Inter-Concourse Wormhole. Resistance is futile. May you emerge at your intended destination."