The test will be retried this Friday; in the meantime, though, you can still enjoy the divorcée/newly eligible bachelor'sAMA (Ask Me Anything) on Reddit. Mr. Musk did the Q&A on the eve of the launch and there's a lot of interesting unpbulished details on his plans for upcoming Tesla and SpaceX products -- including the planned Mars Colonist Transport (MCT). At times the conversation even got a little humorous.
[For landing the craft relies] mostly [on] gravity. The center of gravity is pretty low for the booster, as all the engines and residual propellant is at the bottom.