When a New York City cab driver takes you to LaGuardia Airport by way of the Battery Park Underpass, circling around the financial district. It's a quick but needlessly long route. From the movie Star Trek IV, in which Captain Kirk slingshots the Enterprise around the sun to warp back in time.
"He did some kind of slingshot around the sun... took 2 minutes but added $10 to the fare! That's the last time I let anyone do that."