Well from that admittedly limited information it sounds like some dramatic structural failure..
I do not read the comments that way at all. Seems as if an IRU failed and started the nose pitching down and perhaps the zero g caused momentary loss of oil pressure. The real question seems to be what was the crew seeing on their PFDs. There was a comment mid way down the presentation that seems to indicate that the crew tried to re-engage the autopilot!!!??? (If true, then that was a big part of the problem.)
Total duration of the event was about 90 seconds.
Final report is due in December. Lets hope that a lot of the details get filled in before then.