SLOVAKIAN Peter Pavlisin was tasered three times and was held back by five police officers after holding his pregnant girlfriend hostage during a siege.
The drug-fuelled 23 year old threatened to kill terrified Natasha Motala and revving a disc cutter on her neck and shoulder during the ordeal.
Prosecutor Julian Kesner said Pavlisin, of Painswick Road in Gloucester, had been taking the drug Piko, was paranoid and had not slept for three days.
He woke his 20-year-old girlfriend at 2am saying someone was under their bed and thought she was planning something. He plugged in the grinder and started revving it, threatening her that he was going to kill her with it.
Police arrived at 3.05am after Pavlisin threw a weight, which smashed a window. He took his girlfriend into a wardrobe and told police he had a gun in his hand, while holding a metal bar to her back.
Mr Kesner said: "It was a very stressful, dangerous and difficult situation. The police did not know what they were dealing with. Throughout she felt as if she was going to die."
As a negotiator arrived at 4.09am, Pavlisin began strangling her and two officers tasered him. Mr Kesner said: "Officers described him as an animal. Five officers were holding him in an attempt to control him and it took another round of tasering in order to gain control of him. He was eventually arrested at 4.44am."
Pavlisin pleaded guilty to false imprisonment, making threats to kill and assault causing actual bodily harm following the attack at Barton Street on September 29.
Defending, Steve Thomas, said: "He is shocked about how bad his behaviour can be under this drug and it is likely he was experiencing a drug-induced psychosis."
Judge William Hart said Miss Motala, who is due to give birth very soon, remained in very grave fear. He sentenced Pavlisin, who has 13 previous court appearances for 21 offences since he moved to the country in 2008, to four years and eight months in prison, with a further two years and four months on license.