How did the Greek gods defeat Typhon?

A terrible battle raged, and hardly a living creature was left on Earth. But Zeus was fated to win, and as Typhon tore up huge Mount Aetna to hurl at the gods, Zeus struck it with a hundred well-aimed thunderbolts and the mountain fell back, pinning Typhon underneath. There the monster lies to this very day, belching fire, lava and smoke through the top of the mountain. (Enyclopedia Mythica)