Characters (adolescent or young adults, usually) get together to do something manifestly dumb and often prohibited, but hey, they're young and so immortal, aren't they? The hold-outs are often persuaded because they don't want to look like a Dirty Coward, and often one of the bolder characters urges it's Not Cheating Unless You Get Caught. Visiting an abandoned house or performing a ritual are common. Bullying a Dragon can be a form of it; you're not afraid of him just because he can warp space-and-time with his thoughts! The Call Receival Area and the Forbidden Zone are popular destinations. A particularly idiotic Wild Teen Party may feature one, especially if the participients got very, very drunk.
Occasionally performed by a solitary figure (but even then he often bragged about it beforehand).
Popular Horror Trope. Often makes them Too Dumb to Live. "Hey everyone, we should so go to the abandoned camp ground where dozens have been slaughtered in the last year and have a party with bad music and alcohol! Afterwards, we'll all split up and have sex!!"
Note: does not cover shows that set challenges; this is something the characters dream up of their own stupidity.
- Zombieland averts this with Little Rock, but later subverted somewhat when it's revealed that she hasn't heard of Willie Nelson, Bill Murray, or Gandhi.
- The three teenagers who follow the firefighter and father into the obviously dangerous, quarantined apartment block in [REC] 2.
- An Invoked Trope in The Cabin in the Woods. The five selected victims must be both young and ignore the Harbinger of Impending Doom, engage in "transgressions" (e.g. Death by Sex), and choose the manner of their demise (by going down into the Creepy Basement and handling the Schmuck Bait). If they fail to do these things, the ritual can't take place. Of course the Facility does everything possible to make the selected five engage in these actions.
- In Dan Abnett's Warhammer 40,000 novel Brothers of the Snake, Space Marines are forbidden to try a stunt, diving into a sea trench and leaving something. One young Marine does it, and has an older Marine come to ensure that he needs no help. Then, later, another tries, and the Marine who goes after him is only able to recover the corpse.
- In Poul Anderson's Operation Chaos, when Stephan goes back to college after the war, a prankster conjures up a fire elemental, and it escapes his control.
- In Lee Lightner's Warhammer 40,000 Space Wolf novel Sons of Fenris, Lieutenant Paulinus tries to remember his travels in the city in his younger days. He was ashamed of them — "callow youths looking for cheap thrills" — but now, he needs to lead his men in those sections.
- The fake terrorists from Larry Niven and Pournelle's book Oath of Fealty are in a word, idiots, and have almost no survival instinct whatsoever.
- Older Than Print: In Beowulf, the titular hero describes his and his cousin's swimming across the sea as something they did when they were young and prideful.
- In Sandy Mitchell's Cain's Last Stand, Ciaphas Cain observes that Kayla has too much sense to keep up with Jurgen's crazy driving, despite the delusions of immortality that youth gives.
- In a Warrior Cats Expanded Universe story, a bunch of RiverClan apprentices and young warriors repeatedly do stupid stunts, such as deciding to jump off a cliff for fun, or having a "who can fall out of a tree the hardest" contest. Eventually, a RiverClan cat convinces them to grow up, by having them sit a vigil. It works.
- In Robin McKinley's Sunshine, youngsters sometimes gang together to see if they can spot a vampire. Sunshine did it herself, and her little brother Kenny might be doing it.
- Dave Barry Slept Here explains in the introduction why young people are too dumb to know their country's history:
Young people have always been stupid, dating back to when you were a young person (1971-1973) and you drank an entire quart of Midnight Surprise Fruit Wine and Dessert Topping and threw up in your best friend's father's elaborate saltwater aquarium containing $6,500 worth of rare and, as it turned out, extremely delicate fish. (You thought we didn't know about that? We know everything. We are a history book.)
- Edenborn has Deuce and Penny, who steal a Cool Plane, ransack pantries and wine cellars across Europe for victuals, and realize they're in way over their head with their parents.
- In Ursula K. Le Guin's A Wizard of Earthsea, the young students are showing off their spellcraft when Ged casts a dangerous and powerful spell. He nearly dies himself, the Archmage does die, and a creature is unleashed.
- The informant ghost invokes it in Shaman Blues, noting that pure bravado makes young ghost try to feed on shady energy sources, rather than build their own reserves safely.
- Skippy Dies: In a flashback to Howard's teen years, Guido La Manche rigs up his own custom-made bungee-jumping setup, and talks a bunch of friends into jumping off a cliff with it in the middle of the night. Everyone is initially gung-ho about it, but all back out out of fear, so they choose lots to see how it goes. Howard is chosen, but backs out of it out of fear, leading to his nickname "The Coward". Tom goes in his place, and is permanently disabled after the device unsurprisingly fails and he hits the bottom.
- Doctor Who:
- In the serial "The Dominators", Cully and his friends arrive on the island without permits, for thrills. It makes it hard for him to persuade anyone after the others get killed.
- In the serial "The Invasion of Time", the Doctor assures Borusa that his faciliating the invasion of Gallifrey is not this.
- Game of Thrones features a particularly severe and tragic example with Lyanna Stark, as revealed in Seasons 6 and 7. Young Lyanna (in the books she was stated to be around sixteen) ran off with Rhaegar Targaryen, the handsome (already married) prince she'd fallen in love with, rather than marry her betrothed Robert and without telling anyone what she was up to. Subsequently, everyone thinks she's been kidnapped, which culminates in a bloody civil war that ends with both Rhaegar, Lyanna and several members of their families dying. It can be assumed she didn't consider how disastrously things could end before she decided to elope with Rhaegar.
- Virtually all the teenage characters in Twin Peaks are so dumb it's almost painful to watch. From Bobby trying to scam Ben Horne to Shelly offering live-in care to her comatose Ax-Crazy ex-boyfriend Leo (on Bobby's advice) to cash in on insurance checks to James...well, anything James does, ever, it's a wonder anyone ever reaches old age in this town.
- For all the intelligence shown by the younger generation on Terra Nova, it might as well be Twin Peaks IN SPACE!. Favorite pastimes include making out in the raptor-infested jungle, among other idiotic pursuits.
- Teenagers and young adults did many, many stupid things over the course of Veronica Mars, from vehicular manslaughter to accidental arson to assault and even rape. Many of the kids depicted doing these things weren't even stupid; it was Truth in Television in that a young person's decision-making skills are prone to be compromised by a number of things, including hormones, substance abuse and lack of life experience.
- In many productions of Romeo and Juliet, the fights that break out among the young men in the feuding houses are the result of this. The only cool heads among them, Romeo and Benvolio, get called out on being scared to fight. The title characters are also guilty of this themselves. They're teenagers, have known each other for all of three days, marriage was entirely for business and family honor reasons in their era and social class (Marry for Love was considered laughable back in the day - indulging in romance was what mistresses were for), Romeo was on the rebound from a breakup, and the absolute worst idea either of them could have picked was the cute boy or girl from the arch-rival's house. By the time it's over, half the cast is dead.
- The premise of Shivers is that you get locked in an abandoned haunted museum on a dare.
- In The Woods Are Dark six Irish teenagers decided it'd be a great lark to visit the home where a local boy had murdered his entire family. Despite the fact that one of them disappeared and another was found white-haired and gibbering a few days afterwards, five years later the four remaining idiots actually decide to go back.
- In Erstwhile:
- Brother insists on going out when there's a hunt -- and he's a deer.
- Rose Red and Snow White engage in bear-tipping.
- In Sinfest, one drone taunts another into diving through traffic.
- Pretty much the entirety of Homestuck is based on one of these, though it's not apparent to the B1 kids that Sburb is going to be anything more than a video game (well, Jade seems to be aware of it, but for all sorts of reasons she's actively encouraging them to play). And it turns out the whole thing is a causal loop, so they were going to do it anyway.
- Bumblebee in Transformers Animated might not technically be a kid (as far as we can tell), but he's got the mind of one and does equivalent stupid stuff. The most notable might be his upgrading himself with illegal and dangerous boosters and sneaking out onto an underground racing circuit with Sari.
- The Gravity Falls episode "The Inconveniencing" involves Wendy and her friends breaking into an abandoned convenience store, which turns out to be haunted by a reality warping elderly couple with a homicidal grudge against teenagers. They only survived because the ghosts were willing to negotiate with 12-year-old Dipper (technically not a teen).
- In one episode of Justice League Unlimited, a group of college students performs a ritual that revives Solomon Grundy as a mindless rage monster. The resulting rampage begins with Grundy attacking one of them.