A drunk driver gets into a car accident and is pronounced dead on the scene. Since he registered as an organ donor, he's taken back to the hospital and has his organs removed. The kicker here is that the drunk was never dead, and he was alive and just barely conscious enough to watch as his organs were removed from his body before finally, really dying when the doctors remove his heart. (Supposedly)
"I'll Sleep When I'm Dead": The story of the insomniac who committed a hit-and-run and was so distraught, he began seeing his victim in his sleep-deprived hallucinations and dies of a stroke from being awake for days.
"Frightmare" concerns itself with literalNightmare Fuel - a woman suffering from repeated nightmares of a monstrous dwarf who strangles her in her sleep dies from SUNDS (Sudden Unexpected Nocturnal Death Syndrome), where the heart basically burns itself out over a frightening dream.
One episode had a stewardess sucked out of an airplane. Not only was she still alive as she was falling, but she froze to death from how high up she was. Her death is shown with one of those CGI models, but if you listen closely while it shows her falling, you can hear her scream. What's worse is that it really happened. In 1988, there was a flight on Aloha Airlines (Flight 243) that suffered extensive damage from explosive decompression while in flight, but was able to land safely at Kahului Airport on Maui. The only reported fatality was of a stewardess named C.B. Lansing, who died the same way the stewardess in that story did.
"Crappy Ending" features a man dying of an allergic reaction to a bee sting. What makes it different from the last idiot to die of a bee sting was that he got bumped off by an Asian giant hornet, and those monsters are HUGE! Not an easy death to sit through, especially if you're an insectophobe.
A teenage girl flirts up a science geek into doing her school work. Since the nerd is focusing on the attractive girl chatting him up, he fails to pay adequate attention to the chemistry experiment he is currently working on. The chemicals inside the beaker become so strong that when they waft up, they fuse the girl's contact lenses to her eyeballsand make her go blind (she didn't die from that; she died when she broke her neck after slipping on the school hallway's freshly-waxed floor).
"Vats All Folks" has a psychotic cemetery owner who digs up dead bodies and dissolves them in hydrofluoric acid, but tonight he makes two ex-cons to his dirty work. When they realize his intentions, they say, "Hell no!" and bail. Here's the scary part, he tries to drag the body in, but trips and falls in the vat himself. He gets out, partially melted and walks in agony before collapsing and dying (equipped with the sound of his skin sizzling as he dies)
A taxidermist who enjoys eating animals he stuffs eats the meat of a squirrel that had rabies and contracts it when he eats it rare. For the next four days, he goes insane, screaming, foaming at the mouth, and writhing in bed in pure agony. What's creepier are the shots of the stuffed animals watching the guy die in such a horrific fashion.
A Russian spy betrayed his country by selling secrets to the US. His former employers kill him by giving him a fatal dose (like 1 teaspoon) of Polonium 210 in his coffee. One month later he is seen with all his hair gone, his skin green, his body atrophied, and he hardly looks human anymore. He eventually dies of radiation poisoning and his killers get away with it. Probably based on the Litvinenko case in Great Britain, only with the effects being sensationalised, as they were in the media at the time.