Are you referring to that neat trick they pulled a half dozen times, where they landed a rocket on its tail in an airless environment with 1/6 gravity? That was still pretty impressive on a bunch of other levels.
No, I'm referring to on-earth tests, such as this http://www.youtube.com/watch?v=wv9n9Casp1o However I can't find the exact one I had in mind, or perhaps I was off with the date.
