I somewhat agree(with the fact that hell is gonna be awfully crowded)..One Early Church Father(I think Augustine) said that if hell was opened just a little bit that the smell itself would be enough to kill all humans on earth..
There have been many visions of people in hell as black embers piled up next to each other in a great sea.
"She opened Her hands once more, as She had done the two previous months. The rays [of light] appeared to penetrate the earth, and we saw, as it were, a vast sea of fire. Plunged in this fire, we saw the demons and the souls [of the damned]. The latter were like transparent burning embers, all blackened or burnished bronze, having human forms. They were floating about in that conflagration, now raised into the air by the flames which issued from within themselves, together with great clouds of smoke. Now they fell back on every side like sparks in huge fires, without weight or equilibrium, amid shrieks and groans of pain and despair, which horrified us and made us tremble with fright (it must have been this sight which caused me to cry out, as people say they heard me). The demons were distinguished [from the souls of the damned] by their terrifying and repellent likeness to frightful and unknown animals, black and transparent like burning coals. That vision only lasted for a moment, thanks to our good Heavenly Mother, Who at the first apparition had promised to take us to Heaven. Without that, I think that we would
have died of terror and fear." - Memoirs, Sister Lucy (Lucy Dos Santos)
Some of the punishments in hell according to the vision include:
Blasphemers are hung by the tongue.
Women who use makeup, or dress in a sexually suggestive manner, are hung by the hair over a bubbling mire (and men that had sex with them are hung by the feet next to them).
Murderers are set in a pit of poisoned snakes
Men who take the passive role in anal sex, and sexually active lesbians, are hurled off a great cliff, and then made to climb it again, ceaselessly.
Women who have abortions are set in a lake formed from the blood and gore from all the other punishments, up to their necks.
http://www.hellandjustice.com/near_death_experiences.htm