And if he'd been positioned just half a metre down the board, the predator likely could have had a clear run at his stomach.
"I think it all sort of dawned on me yesterday… and my fiancé was a bit shook up talking about it… but it all could have ended – it was a reality check."
"I mean, I lived in Western Australia for five years when attacks were happening there, and everyone was always talking about it, but for it to actually happen to you, you never think it's possible.
"That's why when the shark came up and actually hit me, and I saw it thrashing around, well I just thought, this is it."
That said, Brough was determined to be back out on the waves as soon as he could.
After a final round of surgery today, and a final check that he'd sustained no tendon or nerve damage, he expected to be wearing the cast fitted around his arm for several weeks at least.
"There'll be a solid two weeks in a cast, then I start rehab, then I'll be back in the water soon after that hopefully."
While he didn't think his injury would affect his surfing, he had no doubt there would now always be a "mental barrier" in the wake of his near-miss.
"It's always going to be there in the back of your head… but I'm inspired not to let it affect me.
"Surfing's what I love doing – the only thing that's gonna hold me back is getting a new board, so if JS Industries were able to help me out there, it'd be much appreciated."
He remained keen to compare stories with legendary Australian surfer Mick Fanning, who also had an encounter with what was suspected to be a great white shark during a tournament in South Africa three years ago.
In the meantime, he wanted to thank in person the people he credited with getting him to safety.
They included his mate Tohi Henry – "he was with me when the whole ordeal happened and was with me all the way through" – along with a Whangarei firefighter who rushed to his aid, and another local, Garry Yeabsley, who transported Brough up the road in his ute to a vacant lot to wait until emergency services arrived.
"I'd like to say thanks to them… I'm going to take a box around to them when I can."