The businessman embarks on the surprising new path as he wants some quick cash to pay back Leah Patterson-Baker (Ada Nicodemou) after she gave money to Geoffrey King on his behalf.
Steve Peacocke, who plays Brax, told TV Week: "He's angry that Leah stepped in for him. He's someone who likes to get everything done himself. He's pretty old school - he wouldn't like a girl and a friend coming to his rescue."
Brax's latest story also comes as he continues to struggle with the death of his lover Charlie (Esther Anderson).
Peacocke continued: "[Brax has] had this horrible loss and is really lost at sea at the moment. All his focus before was on Charlie, getting out of the River Boys and making a new life. Now that's gone and he's feeling a lot of pain.
"Like a lot of blokes, the way they deal with that isn't to hurt themselves, but to put themselves in harm's way. If something was to happen to him, he wouldn't care. It would almost solve his problems."
Peacocke added that he enjoyed the opportunity to film such intense scenes.
"It was unreal. I've been in a few punch-ups, but I wouldn't call myself a fighter," he said. "We had about 12 hours of fight rehearsal with the stunt coordinator.
"I wanted to go hell for leather with the slams and being thrown into the fence. I ended up with lots of cuts and grazes, but I loved it. It was like a good, hard game of footy."
Home and Away airs these scenes next week on Network Seven in Australia and mid-March on Channel 5 in the UK.
> Home and Away Brax to be furious with Leah
> Home and Away Ruby 'makes a move on Dexter'
> Read more Home and Away spoilers and news