PARANOID Macauley Roberts wielded a hammer at his disabled dad, threatening to kill him because he thought he was "possessed", during a drug-induced rage.
The 19-year-old of Rutland Street, Grimsby admitted affray on May 6.
At Grimsby Crown Court he received a sentence of 12 months in a young offender institution, suspended for two years.
Recorder Paul Miller said a 12-month community supervision order will include accommodation, possible employment and mental health support.
He said: "You subjected your disabled father to a frightening ordeal, punching him and imprisoning him in his own home."
He told how a knife, hammer, a TV remote and keys were used to hit his father.
Recorder Miller said: "He feared for his life."
He added: "To his credit your father did not want to pursue the complaint.
"You were mentally unwell at the time, suffering from paranoia brought on by illicit drug use."
Prosecuting Maria Harbin said, the father, Kevin Roberts had undergone an amputation of one of his legs and had lost sight in one of his eyes.
He returned to his home where his son was staying overnight.
As he walked in the front door the son jumped off a chair and punched him three times.
As the father tried to escape he told him: "You are not going anywhere."
The dad was repeatedly struck on his arms by the son using a bunch of keys.
The dad tried to calm the son down after he turned to his father and said: "If you don't kill me tonight, I will kill you."
He said he would "chop his dad up" as he wielded a Stanley knife.
Threats to the father's life were made before the son picked up a claw hammer.
The dad pleaded with his son to calm down and go to bed.
Both men went upstairs where the father hid the hammer under his bed.
As he searched for it the son threatened to throw his dad out of the window.
The dad took off his prosthetic leg.
Once his son had fallen asleep he crept out of the home to raise the alarm.
For Roberts, Simon Hirst said the father sought to withdraw his complaint and wanted his son to get mental health treatment.
Medical reports to the court confirmed the defendant's mental health.
Mr Hirst said: "He believed his father was possessed and he was having hallucinations."
He said the episodes were triggered by illicit drugs.
Mr Hirst said: "The danger for him is drugs."
