A thug, who slashed a policeman with a four-foot Claymore sword, has pled guilty at the High Court in Glasgow on Tuesday.
Jamie Robertson flew into a rage after officers held his father, following a row between the pair at their home in Gogo Street, Largs.
The 22 year-old wildly swung the weapon as he screamed at police: “I’ll take your f****** head off. Get my dad out of the car.”
He went on to slash one policeman, who courageously tried to tackle him.
The PC has been left permanently scarred following the incident, with nerve damage and loss of movement, after suffering a large cut to his hand.
A judge watched footage of Robertson then smashing a window of the police vehicle before managing to free his father Ian.
It took a team of armed officers to arrive on the scene before Robertson was halted.
Robertson is now behind bars after he admitted to charges of assault and behaving in a threatening and abusive manner.
The court heard how Robertson had a row with his dad Ian on August 2 this year leading to the 60 year-old being arrested.
But, while Mr Robertson was put in the back of a police car, his son came storming out clutching a large wooden pole.
He then sprinted towards officers yelling: “Let my dad go or I’ll f****** kill you.”
Police demanded he drop the pole – but Robertson instead returned to his home and came back this time armed with a spade.
He screamed they would get “done in” unless Mr Robertson was freed.
Robertson headed back inside again before racing onto the street clutching a huge sword.
Prosecutor Ross MacFarlane told the court: “He became extremely violent and aggressive, charging and striking out in the direction of police.”
Officers were forced to hide behind a car for safety as they unsuccessfully tried to stop Robertson with CS gas spray.
Robertson then lunged at PC Tristan Hitter badly wounding him on the hand with the sword.
Another officer managed to spray Robertson in the face with CS gas – but it had no effect.
As more police then descended, Robertson raised the sword above his head and threatened: “I’ll take you f****** head off.”
The court heard how one shocked resident recorded some of the incident on her mobile phone camera.
Robertson could be heard shouting as he wields the Claymore in the footage. He was then captured smacking the police car with the sword as he yells on his dad to get out.
A window is smashed in before Robertson cries: “Come on, hurry up. Run, dad...run.”
Prosecutor Mr MacFarlane said Mr Robertson clambered out the vehicle with father and son then heading towards Largs town centre.
A crowd of around 40 onlookers were forced dodge the duo as Robertson continued his threats to kill police.
It was only the intervention of a large armed response team that finally brought the incident to an end.
Mr MacFarlane went on: “Officers presented their weapons, aimed at Robertson and told him to drop the sword.
“He immediately complied. He was handcuffed, straps applied to his legs incapacitating him.”
The court heard PC Hitter – the officer attacked by Robertson – has been left badly traumatised by what happened.
A large cut on his hand had to be stitched. He has been left with nerve damage and loss of movement.
The officer has also required counselling having been affected by nightmares, flashbacks and low moods.
Mr MacFarlane added: “The injury from the sword will leave permanent scarring and impairment.
“It will take up to 18 months to establish if the officers will ever regain full mobility of his thumb.”
Judge Lord Turnbull remanded Robertson in custody and deferred sentencing until next month.