Boy sent flying into air after firecracker causes manhole explosion

Explaining Physics on Instagram: "The explosion of the firecracker beneath the ice sheet creates a rapid release of high-pressure gases and a powerful shock wave in the water, which acts as a dense, incompressible medium to efficiently transmit the energy. The shock wave travels upward and, upon reaching the solid ice, impacts it with immense force, leading to a sudden, high-magnitude stress on the ice layer. This stress, often coupled with subsequent pressure oscillations from the expanding and