Well by possible I mean it is within the realms of possibility, not that it is very likely. I am sure they have tested for this kind of thing. I've read of a couple but usually that was the result of crew opening an armed door into a jetway or catering truck and the slide deflecting back into the cabin.
ETA: When you think about the kind of impact forces seen in the video, I suppose it would be possible for a gas bottle pin to be forced out. The slide pack cover is some kind of plastic or composite which is easily removable for maintenance and on some types so that you can exchange slide packs between doors. Hence the "Do Not Sit" graphics on them. So if one did inflate it likely wouldn't take much to force off that cover on the door bustle and go inwards.
Last edited by givemewings; 8th Jul 2013 at 18:47.