The scariest law in physics that destroys reality

Close your eyes and imagine the universe is not stable, but a bubble of "false vacuum" that could burst at any moment [citation:3]. This is the terrifying possibility of quantum tunneling, where empty space could spontaneously shift to a lower energy state, triggering a wave of destruction that expands at the speed of light [citation:2][citation:3]. If this "false vacuum decay" were to happen, it would not just be an end, but an un-making of all known laws of physics, rewriting reality as it spreads [citation:3]. The threat is not from a distant future, but from a random quantum event that could happen anywhere, anytime [citation:1].