Jan von Holleben is a German photographer, and as seen in his Dreams of Flying series, has been doing the lay-on-the-ground-sideways-so-it-looks-like-you're-upright thing for quite some time. In fact, so confident is Holleben that he originated this idea that he has a "tribute" section on his website, divided into two catergories. "Greetings" are obvious flattery via imitation, including some great fan photos, and "Finds," which might as well read, "I did it first."
Holleben even turned his still photographs into video form, maybe to compete with imitators? Whatever the reason, I think the outcome lovely.
Bell X1 - The Ribs of a Broken Umbrella.