Named for the amplifiers used in This Is Spinal Tap. It's then promptly parodied when Marty asks why the amps go to eleven when they could have just made ten louder. Nigel's brain breaks. "These go to eleven."
The film has a rating of 8 out of 11 on IMDB. (For other films, the scales go up to ten, though even for Spinal Tap, the user can only give up to ten.)
In The Princess Bride, Christopher Guest plays a character who also goes to eleven (fingers). The film also has suggests breaking the scale to perhaps up to five someday. But definitely not to fifty!
"Not to fifty!" is itself an example: in the book, it was merely "not to twenty!".
Love Actually has Colin who believes that his British accent will make him insanely hot in America it does, but while Americans do find people with British accents sexy, the film makes it out that any British guy who walks into a bar in America will immediately have the hottest women throwing themselves at him later resulting in a foursome.
Stephen King wanted cinema houses to play the sound as loud as possible when showing his film Maximum Overdrive—so it would be the loudest movie ever. He later admitted to abusing a popular local anaesthetic during its production. Whether this was connected may never be established conclusively.
The Hunt for Red October has Captain Tupelev: "Inquire with the engineer about going to 105% on the reactor", and then going to 110% when he doesn't think 105% is fast enough
It's pretty close to the trope namer in that in this case, "100%" represents a safe maximum power output level, not the theoretical or even practical maximum output of the reactor, like 10 on Nigel's amp. Given the setting, "100%" probably represents what the reactor system can handle without burning up the sub plus a reasonable safety margin. In the original book, a Soviet Alfa-class sub actually does have a reactor meltdown and gets a hole the size of the superheated reaction mass burnt through its hull and sinks.
At the beginning of the first Back to the Future, Marty plugs his electric guitar into Doc's ginormous amps and blows himself across the room with the blast emitted from playing a single note. It seems Doc had taken the speakers up by a POWER of 11 during a recent experiment but hadn't had time to tell Marty yet.
Saw VII supposedly includes a trap that was "so bloody, so disgusting, and so disturbing, the producers wouldn’t allow them to put it in any of the [previous] Saw films – until now". (source) This in a series that is known for its gory and disturbing traps, and they wouldn't let this one be put in because it was too much? You can bet it will go up to eleven. That, or be a complete anti-climax depending on your opinion.
In The Villain, Arnold Schwarzenegger is a White Hat character with a seven-shot six-shooter. When asked why he had it made, he simply looks confused and said "I don't know".
In Scott Pilgrim vs. The World there's an amp vs. amp battle between Scott's band, Sex Bob-omb, and the Japanese DJs the Katayanagi Twins. The Twins kick off the battle by cranking their amp up to +- (11 in Japanese). This little bit also doubles as an Arc Number/Mythology Gag, as the Twins are Ramona's fifth and sixth Evil Ex-Boyfriendsnote "Evilexes." who Scott has to fight over the course of the film. 5+6=11.
There's the guitar scene from Cheech and Chong's Next Movie, where Chong, in a pot high, decides to pretend he's Jimi Hendrix. His guitar is rigged to a big maxed-out amp, and the entire neighborhood knows he's playing. People outside run for cover, a dog covers his ears, and the neighbor's house shakes. Cheech even has trouble getting inside to stop him since the blast from the speaker keeps slamming the door in his face.
Later on, he tries the same routine in a record store and blows out a "cheap" amplifier within seconds.
Clockstoppers. So, you're in hypertime thanks to your Applied Phlebotinum watch. What happens if you get another watch and go into hypertime again while you're already in hypertime? Zak finds out in the climax.
In Aladdin, when Iago steals the lamp, he mimics Jafar congratulating him for doing the deed, saying, "On a scale of one to ten, you are eleven."