Jake Gyllenhaal has said his experience filming new cop thriller End Of Watch was life changing.
The Brokeback Mountain star revealed director David Ayer's experimental method of having him and co-star Michael Pena actually wear the camera, attached to a vest, completely changed the process of film acting for him.
Jake told movie blog Collider.com: "The rig was obviously a really interesting thing that Dave had designed. We wore the camera on a sort of vest and the camera was placed in the centre of our chest. Then we had our own monitor so we could watch what we were filming.
"That was definitely a weird and an interesting way of making a movie, because usually you're just in front of the camera and somebody else is choosing how it's shot. And in my case I also had my own camera, because my character's filming too.
"But the rig itself was amazing, it allowed for a spontaneity and an interaction where you could look the other character in the eye.
"The camera was below us so we were looking each other in the eye and there was a camera filming your coverage.
"So it added to a real spontaneity, it added to presence, it was amazing, and what I learned from it - the whole process was life changing."
Jake and Michael star as two Los Angeles cops who find themselves marked men after a routine traffic stop turns into an epic drug bust, making them enemies of a notorious gang.