I really don't see the issue.
This looks like it went EXACTLY to plan. Whatever the issue was it was deemed safer to let the pressure out of the bottle by discharging it. Why do it inside the aircraft? Just pull the bolts and throw the whole damn thing out and be done with it then refit in slow time.
I can't imagine how many safety-critical systems must have failed for that to be unintentional. For a start the slide leaves the aircraft symmetrically, are you really telling me that all the fixing points failed at exactly the same time?
Inflammatory posting and representing this to be something that it's not is a bit beneath you isn't it SRENNAPS?