What do ghosts do in the afterlife?

I learned in my Tibetan Buddhism class about those born into the 'hungry ghost' realm. Existing as a ghost, however, is a temporary situation in the round of rebirth (cyclic existence, reincarnation, samsara) as a result of bad karma from a past lifetime. Everything is impermanent, even the afterlife. Tibetan Buddhists believe that hungry ghosts can live for hundreds of years, during which they suffer from hunger and thirst. "Hungry ghosts are obstructed from getting food and water by internal obstructions such as horribly malformed bodies, by external obstructions such as being born into a place that has no food or water or into a place where, even if there is nourishment they are kept from it by guards, or by both internal and external obstructions." The main cause of being reborn as a hungry ghost is an action of desire such as stealing or miserliness. So basically, I guess ghosts may spend their afterlives desiring but not receiving while wallowing in their misery. -bayk