I still think that an oxygen bottle explosion in that location would result in the blast destroying the floor in the vestibule of No. 2 Door Right, with the top of the bottle coming to rest somewhere in the vestibule area. Compared to the fuselage structure, cabin floors are so flimsy there's no way that the floor will remain intact from a blast that can blow a hole in the fuselage. There's plenty of video of exploding oxygen bottles on You-Tube for those who wish to look, but the question that still won't go away is, in the event of a bottle explosion, what was the initiator? They don't go bang by themselves.