Jason Momoa found himself thrown in at the deep end on his first day of filming Conan The Barbarian.
The worst injury happened on the first day when the actor - who plays the titular hero in the 3D remake - was introduced to his horse.
"He bucked me off and I broke a rib. That sucked. I almost died a couple of times on the horse. Basically, anything on the horse [resulted in injury], he was an evil one," he recalled.
As an athlete, Jason, who also plays warlord Drogo in Game Of Thrones, relished doing his own stunts but found it difficult keeping injuries at bay.
"You do that many stunts, you are constantly bleeding somewhere on your body," he said.
Jason took on intense workout sessions to bulk out as the legendary barbarian.
"Six hours of training a day for a month, man. Lots of lifting and lots of boiled chicken," he revealed.
"I wanted him to wield a sword like a guitar and infuse a little of that Asian grace to this barbaric character. I got into shape for Conan and did tons of action and then got to eat whatever I wanted to get turned into Drogo."
Jason's two-year-old son Nakoa-Wolf - he also has a daughter, Lola, four, with his partner, the actress Lisa Bonet - looks like he's following in his dad's footsteps. "Yep, my son loves his swords. He's a sword and shield man," he added.
:: Conan The Barbarian 3D is in cinemas now.