A hopeful explosion, considering the circumstances! This particular failure would have happened even with a dry-land landing, and future flights will be using the upgraded landing leg design that landed successfully back in December rather than the older one used on this flight (for scheduling reasons). The good news is that, for the first time, they managed to do a soft landing on the barge -- and they did it in nasty weather, with huge waves. Looks like whatever improvements they've been making to their control software are working well.