A fisherman has told a Sydney court how he stopped to help a "screaming" woman and her "intoxicated" husband as they stood beside a ute covered in petrol in the middle of the night.
The woman, Sharon Yarnton, and two alleged accomplices have each pleaded not guilty in the NSW District Court to trying to kill Yarnton's now ex-husband, Dean Yarnton, in a planned car explosion at Picnic Point in February 2015.
"I asked him what happened and he said he woke up in the car and there was petrol all over the car," witness Martin Hoang said on Tuesday.
He said he saw a pool of liquid in the tray of the ute.
"I dipped my finger into it and I smelled it and it was petrol," he said.
Mr Hoang and his friend were heading home from a late-night fishing expedition when they saw the ute near bushland along Henry Lawson Drive at Picnic Point.
A woman standing near the ute was apparently on the phone to police and handed Mr Hoang her phone so he could give their location.
When Mr Hoang got out of the car, the woman told him she was being abused by her intoxicated husband who was sitting at the front of the car.
"He was pretty calm," Mr Hoang said, but was angry towards his screaming wife and shouting back at her.
In a triple zero call played in court, Mr Hoang said there was a "man affected by alcohol as well so he's a bit violent".
After smelling the pool of apparent petrol, Mr Hoang asked the man if it was his fuel.
He said no, his car ran on diesel.
Under cross-examination, Mr Hoang said at no time did Yarnton tell him she had poured the fuel over the car.