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The producers break the fourth wall on Real World: Hawaii to stop an alcoholic cast member, Ruthie, from getting behind the wheel while she's drunk.
Kelly Clarkson is crowned the winner of the first season of American Idol, leading to her career as one of the most successful pop stars on the planet.
Combative Eva "the Diva" Pigford becomes the first of many memorable competitors on America's Next Top Model.
On the appropriately titled vh1 show The Surreal Life, petite actor Verne Troyer drunkenly urinates on the floor while riding his motor scooter.
Teen Mom star Amber Portwood attacks her boyfriend Gary on the show, and the footage leads directly to the local police investigating her home and placing her under arrest.
Sue Hawk gives an unforgettable speech about the snakes and rats during the first season of Survivor, encouraging the Jury to let the snake (Richard) eat the rat (Kelly) and win the game.
Snooki gets sucker punched in the face during the first season of Jersey Shore, leading to a bonding session amongst the cast. It also led to this guy losing his job!
Lauren Conrad lets a blackened mascara tear escape on The Hills, a moment that is inseparable from the series.
Audiences watch as the titular couple in Jon & Kate Plus 8 go from loving to squabbling to thinly veiled hatred over the course of the season. They eventually divorce.
After plenty of reality shows examine the before and after of plastic surgery, a new low is reached with the competition show Bridalplasty, which pits brides against each other in a battle for surgeries.
Stephen slaps Irene on Real World: Seattle as she's moving out of the house, leading to his own dismissal from the loft.
Pedro Zamora reveals his positive HIV status on Real World: San Francisco, becoming an icon for the illness and bringing awareness to the issue.
The wacky, warm, weird Osbourne family let cameras into their home, opening a Pandora's box of future voyeuristic family shows.
The Kardashians love putting their crazy family out there on Keeping Up with the Kardashians, but the show took a brutally real turn when Khloe dealt with a DUI.
Why do we love singing competition shows so much? Because every once in a great while, a talent appears like Susan Boyle's, on Britain's Got Talent.
Jon Dalton earns the nickname Jonny Fairplay when he fakes his grandmother's death to elicit sympathy on Survivor.
Long before she hosts The View, Elisabeth Hasselbeck is a fan favorite on the second season of Survivor, where she is so starved she actually loses her hair.
Landmark MTV reality show The Hills ends with a shot of Brody Jenner on a set, suggesting the show was fake the entire time.
Punk'd has a simple formula—watch celebrities freak out—and its genius was solidified in the first season, when Justin Timberlake got so upset he cried.
Dating shows get a whole lot more devious with the advent of Joe Millionaire, a show where women competed to win the heart of a millionaire... who turned out to be a plumber.
Teresa Giudice flips a table on the season finale of Real Housewives of New Jersey, and a reality star is born.
Before she was the darling of the fashion world, Nicole Richie artificially inseminated a cow on The Simple Life.
A mother dresses her child in a Pretty Woman-themed costume on Toddlers and Tiaras, seeming to forget that means she's wearing a prostitute costume.
While most of Laguna Beach focused on the love triangle drama with Kristin Cavallari and Lauren Conrad, a better, realer moment was when cast member Morgan learned that she had been rejected from her top choice of college—the only one she applied to.
Is anything off limits for the Kardashians? Kourtney Kardashian pulled out her own baby on television—twice.
Tyra Banks completely loses her cool on America's Next Top Model, screaming at one of the contestants.
Jessica Simpson cements her numskull reputation when she asks husband Nick Lachey if she's eating chicken or tuna because she doesn't get the "chicken of the sea" concept.
The Countess LuAnn de Lesseps chides Bethenny Frankel for introducing her to a driver without using her full title on Real Housewives of New York.
Michael Skupin passes out and falls into a fire on Survivor, becoming the first contestant to have to be medically evacuated from the island.
Kenya Moore gives the catchphrase to end all catchphrases on Real Housewives of Atlanta when she declares herself "Gone with the Wind fabulous."
Sisters Kim and Kyle Richards finally let their long-standing sibling rivalry overtake Real Housewives of Beverly Hills, with a drunk Kim inexplicably screaming, "You stole my god d*mn house!"
Omarosa Manigault becomes the first in a long line of reality TV villians we love to hate on the first season of The Apprentice.
Alexis Neiers makes constant phone calls to Vanity Fair writer Nancy Jo Sales to let her know her disappointment in her expose, on Pretty Wild.
Diddy breaks up the actually very successful band, Danity Kane, on Making the Band just because he doesn't like the girls' attitude.
Groom Charlie threatens to gut his limo driver on his wedding day on True Life: I'm Getting Married.
Contestants forcibly shave the head of Marcel on the second season of Top Chef, leading to charges of hazing.
Producers bring an otherwise contraband television set to the home on the Real World: Chicago to show the cast the unfolding events of 9/11.
Honey Boo Boo is introduced on Toddlers and Tiaras, giving America one of the funniest reality characters of all time.
NeNe Leakes unleashes the all-time best romantic advice ever on the Bravo network during a reunion for Real Housewives of Atlanta.
Ali Fedotowsky confronts contestant Justin Rego on The Bachelorette to accuse him of having not one, but two girlfriends at home. Whoops.
The Bachelor/Bachelorette franchise finds actual lasting romantic success in the the pairing of Trista and Ryan Sutter.
In one of the absolute grossest challenges on gross-out show Fear Factor, contestants are forced to drink donkey semen.
Psychic Allison DuBois creepily puffs an e-cigarette after telling the women she knows how they will die on Real Housewives of Beverly Hills.
Ali Fedotowsky didn't just have to deal with a guy with a few girlfriends at home—she also had one creep-o contestant get a giant tattoo on his wrist to represent their (non) relationship.
A whopping four cast members from Celebrity Rehab with Dr. Drew pass away from complications of their addiction.
Shocking even Catfish host Nev Schulman, a girl admitted she was catfishing someone... and then finally met her beau and learned he was lying, too. Young love!