Please help me out. I'm trying to understand Hawking radiation. When the particle anti-particle is created is it only chance that determins which of the two falls into the black hole and which of the two escapes? If it is by chance then is the eventual evaporation of a black hole determined by the happen stance of more anti-particles falling in than normal particles. If an anti-particle escapes and the particle falls in does the black hole gain mass? Is there a probability ("remote" doesn't adequately characterize it) that a black hole could spontaneously create enough quantum pairs at the horizon and where all particles falling in were anti-particles to instantly pop the black hole out of existance. Can any of these remote probabilities be calculated for a given black hole mass. Is it possible that the big bang was merely a lowest probability quantum event?