Kingsman: The Secret Service

In the film and trailer, when the new Kingsman recruits have their first nights sleep interrupted by a deluge of water pouring into the dorm, on-set, the scene went horrifically wrong. As writer, producer, and director Matthew Vaughn recalls "I shouted 'action!', the computer got it wrong and vrrrrssshh, everyone was twenty feet down underwater. Cameras, sound guys. People were in waders full of water, panic, everyone diving in, and pulling people out." The set, painstakingly planned and rehearsed using height markers and computer-programmed water tanks, washed away in a nearly Biblical flood when said computers went rogue. "Those actors weren't acting, they were absolutely terrified", shudders Vaughn. "It was awful for the first day of filming."

Many people think Gazelle has a security implant (visible by the scar behind her ear) and that her head should explode like the other conspirators' heads do when "Merlin" activates the security system. However this is because when the implant is first observed by the Kingsmen (during the video of Valentine SIM cards announcement), viewers mistake the character the scar is shown on for Gazelle. But it's not her, it's a nameless Valentine assistant (played by Johanna Taylor) that in that particular scene looks a bit like Gazelle. Gazelle does not have an implant.

There is an extra scene just after the end credits begin.

The Vietnamese, Argentine and Indonesian cinema versions cut out the notorious church scene.

Featured in Take That: Get Ready for It (2015)