An ex-pub landlord who barricaded himself in the derelict boozer threatened to kill his wife before assaulting two police officers who refused to let him have a cigarette.
Paul Hulme, 49, who had been squatting in The Jolly Miller in Harpurhey with his wife and girlfriend, had taken an overdose before the incident in May, a court heard.
He previously had tenancy of the pub and squatted there after the deal ended.
Police - who donned riot gear - rushed to the premises, on Fernclough Road, on May 26 following reports Hulme had barricaded himself inside.
The road was taped off while emergency services attended.
A number of 'makeshift weapons' were found at the property, but 'none of those were used... and there was no assumption that he was going to use them', Virginia Hayton, prosecuting, told Manchester Crown Court.
It was while police were attending that Hulme made the threat to kill his wife to an officer.
His wife was not in earshot, and 'did not feel threatened', the court heard.
Read more of today's top stories
Police were called to the scene, and when they arrived, found Hulme was 'clearly suffering the effects of the medication'.
At that stage he was compliant, but it was after he was taken to hospital and he was waiting to see a clinician that he became aggressive.
"He asked to go outside for a cigarette, he had to wait to be seen. He didn't take that well.
"He started to square up to an officer. The officer pushed him back on the bed. He had a struggle with the officer. He accepts being abusive," Ms Hayton told the court.
One officer suffered minor injuries, while the other officer was unhurt, the court heard.
Hulme, who initially pleaded not guilty, changed his plea on November 19, three days before sentencing.
He pleaded guilty to one count of threats to kill; and two counts of common assault.
The court heard Hulme had 25 previous convictions. The most recent was an assault in 2007.
Defending, Andrea Lock, said Hulme was remorseful and that he was 'very unwell' at the time of the incident.
She said that 'rehabilitation would be the key to not see him before the courts again'.
Hulme's Facebook account shows two photos of him with an image of a hand pointing a gun to the lens superimposed onto them.
His social media profile says he 'started a new job as assassin for hire' on April 24, 1987.
It also says he 'started a new job at the World University of Hard Knocks' in May this year.
Judge Patrick Field QC sentenced him to just over 11 months - 344 days - in prison, saying his behaviour at the time was 'violent and abusive'.
Addressing Hulme, wearing a Fred Perry jumper, he said: "The incident giving rise could have been very dangerous. It could have gone very wrong. People might have been badly hurt.
"Of course I have to bear in mind it didn't come to pass. I know that the threat against the life of your wife was made to a police officer and not your wife.
"She said at the time that she didn't feel threatened. But it was entirely reasonable for the police officer to take that threat very seriously.
"So far as the incident at hospital, your behaviour was totally unacceptable, violent and abusive. You have shown yourself to be genuinely remorseful.
"You were very unwell on this occassion. But you have taken steps yourself to address your problems and and continue with your medication.
"It is easier to be compliant with medication in prison."
