Ia Orana all !!!
I have heard of a story like this one long time before don't remember the airline but the slide inflated inside the cabin and injured a few crew members and passengers, what saved them was the fact that a cabin crew member took a knife and punctured the slide.
This is also the reason why we DEMAND that no one seats on those compartments, you can't imagine the number of times I had to tell people not to seat on the slides, there are pictograms on the shell that request people not to seat on them. I mean when you go in a park or to the theater, before you seat down somewhere, you do look at the seat no ??? You do notice if there is a gum, or dirt etc, well, PLEASE, do the same on the aircraft, when you go in the galley, have a walk about, LOOK at where you are seating, if there is a sticker that says, DO
NOT SEAT !!! It is for a reason !