File:RalphLathrop BobHornsby GroundFlying.jpg

Here is a good example of "ground flying" as Carl puts it. Bob Hornsby is stopped on the mainline with his locomotive as he has a brief chart with the late Ralph Lathrop. Standing to the right is the late Ev Ryan. Bob is lying on a long flat car to keep the center of gravity low (for speed). From http://www.northeastlivesteamers.org/Docs/History/NELSmem_boxford_1.html