While watching the Discover Channel, they mentioned a jet of gas emitting from a black hole . . . . yet they say they are so powerful that not even light can escape them. So if not even light can escape the gravity, how would "jets of gas"? As a side note, . . . I realize that most of theoretical physics is based upon the math. My question is, because it works on paper, does that mean that it would really work in reality [such as singularities]? Thanks for the input. First post. I hope to find some good information on this site.