One of the most memorable scenes from 'Kingsman' was originally longer and more violent

The surprise hit for 20th Century Fox with a worldwide gross of over $400 million stars Colin Firth as suave secret agent Harry Hart who recruits a kid from the streets named Eggsy (Taron Egerton) to be part of the Kingsman. But Eggsy is quickly thrown into the fire when evil tech whiz Richmond Valentine (Samuel L. Jackson) creates a technology that can cause mass terror across the globe and only the Kingsman can stop him.

On the hunt for Valentine, Hart ends up at a hate church group in Kentucky. And this is where the movie hits its peak. While Hart is in the church, Valentine tests his technology, which causes the SIM cards in everyone's phones in the church to make them become homicidal maniacs.

What unfolds is a three-and-a-half minute sequence in which we watch Hart shoot, stab, slam, and break everyone in his path as the guitar solo from Lynyrd Skynyrd's "Free Bird" plays in the background. 

In a talk with Mark Millar, author of comic book "The Secret Service," which the movie is based on, he revealed to Business Insider the bloody church scene was intended to be longer.

"What's funny is there was a seven-minute version of it that Matthew original had in one of the early cuts," Millar told BI.

The scene in the final version contains a few cut-aways to Valentine, Eggsy, and fellow Kingsman, Merlin (Mark Strong), all looking on at different locations.

"It's amazing what the cut-aways do [for the scene]," he said. "Those three or four seconds give you a moment to take a breath. Seeing it relentlessly for seven minutes you're like holy s---, I can't believe what I'm looking at. It's obscene! Matthew asked me if I thought it was too much and I was like, 'I'm feeling it's too much and I'm the guy whose been playing video games since 11 and I can't handle this.'"

But Millar admits the church scene is one of his favorites from the movie. It's one of the few scenes in the film, he says, which was changed completely from his comic.

Instead of Harry Hart taking out most of a church congregation, in "Secret Service #2" the evil signal is unleashed at a beautiful beach where a group of brides and grooms are getting married. When the signal is turned on they pummel each other to death.

"I wish I had thought of that," Millar said of the church scene. 

Millar also loves how Hart, a button-downed James Bond-like secret agent, completely loses it.

"Guys like James Bond are so highly trained you never really get them to cut loose in movies and show what they can really do," he said. "Maybe all they do is fire a couple of shots off or jump across a building, but to actually see them go nuts and not hold back was just fascinating. It was like James Bond trying to survive in 'The Walking Dead.'"

Currently there are no plans to release the 7-minute scene.

Check out the final version of the scene below.