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A bear trainer has revealed his extraordinary talent - and bravery - in a hair-raising film about his work.

Top Hollywood bear trainer and 71-year-old Doug Seus has been helping bring the 300lb beasts to the big screen since 1989.

Seus, who lives with his with Lynne in the wilds of Utah, has spent long hours getting to know the animals and trusts them to the point of letting them wrap their jaws around his face and tussle with them on the floor.

This is despite knowing that a single bear bite is powerful enough to crunch through a human bone.

The couple has trained three bears, bart Two, Honeybump and Tank to work alongside stars such as Morgan Freeman and Brad Pitt.

Recently eight foot six inches tall Bart Two featured in the critically-acclaimed Game of Thrones series.

Explaining his strange passion for the bears, Doug said: "My passion for bears started in hiking and being out in the world with them.

"The Grizzly Bear...adds to the dimension and power of the environment that you're in.

"We spend enormous hours behind the scene...not teaching tricks but getting into the heart and soul of the bear."

The un-bearlievable furry family are the ambassadors for the Vital Ground Foundation, set up by Doug and Lynne which has helped to protect 600,000 acres of crucial wildlife habitat.

Doug said: "The health of our planet are the most important things to us and our grizzlies."

Grizzly bears are thought to be more aggressive than black bears due to their size.

As this prohibits them from climbing trees to safety they learn to defend themselves on the ground.