In the Red Line metro tunnel, the passengers in the derailed subway train are exposed to severe heat and toxic gases, which causes them all to eventually lose consciousness. The train driver tries but fails to open the doors along the length of the train, until reaching the rear where he sees the incoming lava flow in the tunnel hundreds of meters away. Meanwhile, Olber leads his team through the tunnel to the derailed train, searching for survivors. They manage to save everyone, but Olber notices that the train driver is still missing and goes back. He finds the driver alive but unconscious, just as the lava reaches the train and begins to flow underneath it. Olber sacrifices his life by jumping into the lava flow, throwing the driver to safety.