Looks like my early wild guess of a LOX tank rupture was about right. My other guess was that it was due to a failed relief valve but then that seems pretty intuitive so I may be all wet.
BTW - You have an absolutely great screen name for this thread!
Good call! Might be a gaseous helium pressurization tank problem.
What is it with Falcon 9 Helium problems?
http://www.reddit.com/r/spacex/comments/268rse/what_is_it_with_falcon_9_helium_problems/
Why do pressure-fed systems have to be pressurized with helium or nitrogen?
http://space.stackexchange.com/questions/9311/why-do-pressure-fed-systems-have-to-be-pressurized-with-helium-or-nitrogen