A teenager who stabbed an Olympic worker causing his heart to stop was jailed for 15 years on Tuesday.

Tristan Henry, 17, of Hartley Road, Finsbury Park, attacked Tomasz Baranowski, 24, leaving him blind and paralysed after the scaffolder had racially abused him.

The fight started on the N98 bus as it passed through Maida Vale. Mr Baranowksi and a friend were singing football chants when Henry, who was 16 at the time, told him to “shut the f**k up”, the judge said.

Mr Baranowski, then started making monkey noises which prompted Henry, who is black, to pull out a flick knife.

Henry moved away to the front of the bus, but Mr Baranowski sat next to him and a scuffle broke out causing the pair to leave the bus.

Witnesses say they saw Henry stab the victim twice, then stamp on his head before smiling and walking away, stealing Mr Baranowksi’s jacket, �40 and a mobile phone.

London’s air ambulance crew had to perform open heart surgery in the street to save Mr Baranowski’s life.

Judge Anthony Pitts said: “You did, in fact, kill Tomasz. The fact he was brought back to life 10 minutes or so later was nothing to do with you.

“If they had been held up at all they wouldn’t have been able to bring him back and you would have been facing a murder charge.”

He added: “Many might say it would have been better if he had stayed dead, for his own peace and so his family could have remembered him how we was.”

In mitigation, defence counsel said Henry had suffered “postcode bullying” since moving to Finsbury Park from Tottenham, and occasionally carried a knife for protection.

But Judge Pitts considered Henry dangerous and sentenced him to a 15-year custodial sentence with a minimum of seven-and-a-half years behind bars.

During the trial, Mr Baranowski’s mother Irena said: “I’ve been crying every day since the incident. I have panic attacks and nightmares every day.

“He was a handsome and tall man and when I see him now as he lies still in his bed I can’t bear it.”