When the spy action comedy 'Kingsman: The Secret Service' was released in February, audiences were blown away by the fight sequences that mostly involved Colin Firth.

In the film, the English actor is shown in the usual gentlemanly roles he is known for. However, the character Harry Hart also happens to have a bullet-proof umbrella and a poison-tipped dagger hidden in his oxfords.

Perhaps the most notorious scene that featured Firth was the church fight scene, where church goers suddenly turn into blood-thirsty killers and try to massacre each other. Firth's character, who is also referred to by his Kingsman name Galahad, initiates the bloodshed and is also the sole survivor.

Yahoo has just released an exclusive behind-the-scenes video showing how the insane sequence was made. The clip reveals that the scene required a 20 person stunt crew, almost 100 extras and an entire week of rehearsals.

Although the scene looks like one long uncut shot, the video shows that it was only made to appear unedited. There were several takes and the cinematographers took extra care in splicing the takes together. Firth actor worked extra hard in practicing his stunts for the scene.

Firth is best remembered for playing Mr. Darcy in the TV film 'Pride and Prejudice' as well as the two 'Bridget Jones' movies. He was nominated for an Academy Award for his performance in the Tom Ford film 'A Single Man.' The actor eventually won the Oscar for Best Actor for playing King George VI in the 2010 movie 'The King's Speech.'

'Kingsman' was based on the comic book 'The Secret Service' by Mark Millar. It was directed by Matthew Vaughn and also starred Taron Egerton, Mark Strong, Samuel L. Jackson, Mark Hamill and Michael Caine. It only had an $81 million budget but has earned more than $403 million worldwide.

Millar is currently planning a 'Kingsman' sequel, however it was not confirmed whether Vaughn would return to direct the project.