The phone call lasted just 36 seconds.
But it was so threatening that the woman who received it had to get a police escort afterwards.
Edward Harold Alan Wilson's "extremely unpleasant" call was part of a campaign of intimidation and harassment by bikies associates, Brisbane District Court heard.
After being released on parole in 2019, an ex-partner organised a group to threaten the woman and make her hand over ownership of a Queensland gym.
"The complainant was subjected to a series of acts, phone calls, people coming to her home in respect to getting her to sign over the gym," crown prosecutor Jennifer O'Brien said.
In September 2019, the woman went to the gym to collect some items when she received a phone call from a man who told her to "get out of the gym right now".
The woman then received another phone call, this time from Wilson.
"Is your mum still standing next to you? I want you to have a good look at your mum, look her in the eye and explain to her what you've done and why she is going home by herself - do it," Wilson told the woman.
"Give the keys in today...f*** off."
When the woman asked what he was talking about, Wilson said: "You know exactly what I am talking about you c***, don't play stupid."
The woman then asked: "Who the f*** is this?"
"Who the f*** am I? Keep going and you will find out," Wilson replied.
The woman recorded the 36 second exchange and had to be escorted by police from the gym, Ms O'Brien said.
Phone records show Wilson contacted an associate of the woman's ex-partner after the threatening call.
Police later arrested Wilson after they found him hiding in the bedroom of his home.
The woman experienced very significant psychological and emotional suffering from the campaign of intimidation, the court heard.
"Ultimately given the number of acts ...(the woman) did sign the gym over," Ms O'Brien said.
Wilson, 34, told Judge Ian Dearden that he was deeply remorseful for his actions.
"Since then I have totally grown as a person, father and son," he said.
"I wish to change my life."
Wilson was on parole and a suspended sentence when he made the threatening call.
He has an 11-page criminal history and is currently serving a six-and-a-half year prison term for other offences, the court heard.
"It was your involvement with various members of outlaw motorcycle gangs that got you involved in this," Judge Dearden told Wilson.
"Your role in this was a very short 30 second phone call which she recorded. It is extremely threatening, and extremely unpleasant."
Wilson pleaded guilty to one count of threatening violence after the Crown on Friday dropped an extortion charge.
He was sentenced to six months in prison to be served cumulatively with his other terms.
Wilson had his parole eligibility date extended from February 2024 to March 2024.
