Rescue 911/Nightmare Fuel

• You know that part at the beginning of the opening credits, when the camera pans through a kitchen and finds a prone body? The footage was from a COPS-style Real Life documentary from the first season, and that's a real murder victim. There is a corpse in the opening credits.
• Imagine being 13 years old and home alone, and all of a sudden, BAM! A scary chick (nicknamed "War Bitch") and her boyfriend break into your house.
• Also a woman is stabbed at least 20 times while her daughter was on the line with 911.

"What did he beat her with?"
"A knife!!"

• A mother is in the shower, and her three-year-old son innocently unlocks the front door upon hearing a knock--thus letting in a rapist.
• In the episode with the crocodile in Africa, they don't actually say it quite yet...but you can see that the dad's arm is missing.
• "Piggy Peril," where they show the fire gradually spreading and the pet pig wandering around trying to find a way out. Regardless of WHAT you think about pigs, that is fucking terrifying.
• "Trailer Fire," where a woman is screeching about how her trailer home is on fire.
• A man cuts his wrist with a woodsaw in "911 Woodshop Trauma."
• "Bathtub Seizure." Just the line, "This kid is going to see his mom die."
• "Runaway Boxcars," and the thought of what was going through the man's head as the cars hit him.
• "Cave Divers," wherein four divers decide to explore a cave in a freshwater spring without proper training. One diver swims out, but the other three are trapped in the cave. Two throw off their gear and swim up to an air pocket, but the third doesn't make it. The person rescuing them mentions that when people are drowning in caves, they often throw their gear off right as they drown, and that he finds the bodies floating above them most of the time.
• "Chocolate Chips," as it deals with a nut allergy. Nut allergies themselves are VERY freaking scary.
• "Roller Coaster Rescue," where a teenager gets trapped and dragged under a roller coaster. You can see his leg hanging down in the recreation.
• The episode where a convertible accidentally drove right under a semi