A 17-year-old boy inflicted a savage attack on his mother in which he threw punches and pushed her into a wall soon after he argued with his girlfriend.
The victim had slapped the boy on the arm when he refused repeated demands that he stop hitting walls inside her house.
The boy's violence, Albury Children's Court has heard, continued with him throwing his mother to the floor and pinning her down.
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This left the victim with extensive bruising and resulted in the boy, now 18, pleading guilty to assault occasioning actual bodily harm.
The boy also pleaded guilty to charges of intimidation and intentionally or recklessly destroy property over an incident in which he teamed-up with his older brother to target another man.
Defence lawyer Rachel Thampapillai said her client's behaviour was child-like and demonstrated he was unable to regulate his emotions.
But Ms Thampapillai pointed also to a NSW Juvenile Justice report that revealed he "shows significant insight" into what he did.
She said the boy had a traumatic background, having experienced a childhood of deprivation and violence where his mother and her partner provided him with illicit drugs.
Despite his troubles, Ms Thampapillai said, the boy wanted to be a "pro-social" member of society, having set his sights on studying mechanics at TAFE.
Magistrate Rodney Brender said the facts on which the boy was being sentenced were "pretty concerning".
"That sort of violence on someone in the home is completely unacceptable," he said.
The boy's mother was only able to stop the attack, inside her her home north of Albury on January 10, as he stood over her with his legs spread apart.
"The victim," police said, "kicked the young person in the genitals to get him off her."
He was arrested at Dubbo on January 17.
The intimidation charge related to an incident on April 15 where the boy and his brother went to a man's Culcairn home.
They stood on the footpath demanding the man, who was out back working on his car, come out so they could fight.
The victim refused, telling them to "f ... off, go away".
The boy then kicked the letterbox off the fence and did likewise to a gate.
As they left, the brother yelled threats including: "We will get you c ... "
The boy was placed on a 12-month probation order for the assault and a bond for the intimidation, both without conviction.