One of my earlier monk acquaintances, maybe he was in the army or something. But he was in the whole group to be shot dead with another 12 or some more people, but he always repeated Quan Yin Bodhisattva all his life, even before he became a monk, just a normal monk, not a bhiksu, not a fully precepted monk. He did not die, he just fell down. Maybe later on, or maybe in other sutra, it says that whoever often respectfully recites the name of Quan Yin Bodhisattva with a pure heart and sincerity, fire won't burn him, water won't drown him, bullet cannot kill him. And so, he told me he believed it because it happened to him. Everybody else in the group died, but not him. The power of Quan Yin is very great. It depends also on your sincerity and karma.