He is as yet unidentified, but that is probably about to change.
The man emptied his bladder about six hours into the 11-hour flight.
Amos Chapple, who was also on the flight, said this week: "I hear this sound of running water ... and there's this guy pissing in the aisle, waving back and forth."
Chapple has now given more details of the incident.
"It was a gruesome view. I grabbed hold of the urinator's T-shirt. He was peeing a long, healthy stream of urine and it looked like it might go on for a while but, with my hand on his shirt, I was realising what a delicate little crisis it was. If I started grappling with the guy there'd be a lot of collateral damage.
"Most of the pee was being directed at the carpet so I would only make things worse by wobbling the guy around - it would be like wrestling with a sprinkler."
More and more passengers became aware of what was happening.
"At first he was fending off the shouts and smacks with a drawled 'hey, hey, hey' - as if to say 'come on now, I'm trying to have a pee here, I'll be with you in a minute'."
But faced with an angry mob, he pulled up his shorts and staggered back down the plane to sit down.
Jetstar let the man leave the plane with only a warning and police were not called.
But passengers got the last laugh. Chapple confronted the man as they went through Customs and he apparently had no memory of the incident.
"But something dawned on him," Chapple said. "He said: 'Oh my God, the Subway! That's why it was all wet. And I ate it'."
Amos is a freelance travel photographer, his work can be seen at www.amoschapple.com
