Bob is in a crisis, so he turns to God, gods, Crystal Dragon Jesus, aliens, or Trope-tan for aid but laces it with an ultimatum. Bob will be the bestest follower and prophet of his/her/its/their greatness if they'll just come through with this one teeny-tiny miracle. If they don't? Well then he'll have empirical proof of the absence or jerkassness of God, and will convert to another religion or become a Hollywood Atheist. See also: Smite Me Oh Mighty Smiter. Examples of Religious Russian Roulette include: