A 28-YEAR-OLD man, who bashed his girlfriend and her son before king hitting her ex-husband, was "resentful" that the family was gathering to celebrate the son's 25th birthday, the Gladstone District Court heard.
The man, who we have chosen not to name to protect the victims, went to the pub around lunch time because he was angry the family was having a barbecue at the house he lived in.
At 11pm his 47-year-old girlfriend went looking for him.
Crown Prosecutor Sam Bain said the pair exchanged words before the defendant followed his girlfriend home and attacked her.
The court heard she escaped and crawled into the lounge room where her son intervened saying, "You're a big man, hitting my mother around".
On a violent rampage, the man turned his attention to the son, pinning him against a wall, punching him in the head and stomach.
"I'm going to beat the crap out of you. I'm going to blow your head off," he screamed repeatedly.
It was at this point, the ex-husband stepped in and was punched with enough force in the face to require reconstructive surgery and a metal plate, Crown Prosecutor Bain said.
Judge Paul Smith said the ex-husband was lucky to receive treatment quickly, as he would have been permanently disfigured otherwise.
The defendant stood quietly in the dock, with no family or friends present.
Judge Smith sentenced him to three and a half years jail time, suspended after 12 months.