There might be something here though that is kind of similar which while it may not be what the question asker is mentioning seems germane to something you mention in your post. You mention about "packets to 'burst in case of emergency'" -- by which I presume you mean the "lysosomes", is this correct? If that's the case then it's interesting to point out that after death, something much like this happens: it's called "autolysis", and essentially what happens is all lysosomes in all cells break down as the energy reserves that maintain their integrity drop to zero, and it's part of the decomposition process of the body after death. Cells must expend energy to keep the "packets" intact, and when that energy runs out, the packets burst -- everywhere.

I suspect though this autolytic process is slower so it might not have the same drama (and it doesn't appear to given what we seen in actual decomposition), and it is often overridden by bacterial action but nonetheless it fits your description of "bursting 'emergency packets'" in the cells, if you are thinking the same thing I'm thinking (lysosomes) and it happens to all cells. And microscopically it results in the disintegration of the cell membranes and happens over a few hours. Yet interestingly despite the destruction of the microstructure it does not result in the immediate reduction of the body to an unrecognizable mass of glop in that time frame, perhaps because as others have mentioned here the presence of extra-cellular material structures in tissues (although the reference materials I looked at -- forensic manuals especially -- don't give time frames for the deep details like, e.g. when membrane cohesion vanishes versus, say, enzymes starting to work on the extracellular stuff -- and I suppose this is all complicated by the extra factor of bacteria which also get to work fairly quick.). Nonetheless some things do get rather "squishy" and some might also turn all the way to "soup" by this process alone (I've heard something regarding the brain.). When the skin breaks down what happens is you get what's called "skin slip" where it becomes loose and falls off with light mechanical agitation.