AK-47’s, bundles of dynamite, sliver-tight crevices, and now an earthquake…  In the words of Samuel L Jackson, “Hold onto your butts…”

But maybe the “ceiling” will come done such that it opens up to the sky… but it would be too lucky to have that happen and not bury anyone in the process…  ceiling- is that what we call the cave surface above us but below ground?  Sure, ceiling is fine, but consider that from another perspective it creates a sinkhole– if the collapse extends to the surface…  and could be their ticket out.