You are both correct and incorrect (yeah, one of those). Black holes to expel matter, even matter that has gone past its event horizon. Impossible, you say? Not with quantum physics! (this stuff just solves everything!!!) With quantum physics, particles encountering resistance will, if they have enough energy, "tunnel through" the matter ionstantaneously, even if its faster than light. However, after the object is passed, the particle releases the energy it needed to tunnel through the matter or space and becomes a "normal" particle again. But this requires a tremendous amount of energy, and particles very rarely have enough to tunnel like this (EXTREMELY rarely). There are other ways, as well, but those are really wierd ways. Listen to Thed about gravitons.