Simon Everitt's body was found tied to a tree
The murder of a 17-year-old student from Norfolk was based on a scene from a spoof horror film, a jury has heard.
Norwich Crown Court was told how Simon Everitt, from Great Yarmouth, was tied up and petrol poured down his throat before he was set on fire.
Simon's body was found in woodland at Mautby in June 2008.
Maria Chandler, 40, and Jimi-Lee Stewart, 25, both from Great Yarmouth, and Jonathan Clarke, 19, from Telford in Shropshire, all deny murder.
Opening the case, Karim Khalil QC said that the prosecution would demonstrate the "grotesque brutality that young people can inflict on one another".
Mr Khalil said Simon and the two male defendants had all had a relationship with a woman called Fiona Statham, who was "playing off" each of them.
The court heard that Simon was murdered between 6 June and 29 June last year.
His body was found about three weeks after he was reported missing.
Jurors were played a scene from the British horror film Severance in which a character was shown tied to a tree.
In the movie a man is shown throwing petrol over and setting light to his victim.
Mr Khalil told the court that Simon suffered a fate inspired by that scene.
The jury heard that the teenager was driven to remote woodland in Ms Chandler's car.
"He was initially assaulted," Mr Khalil said.
"He was bundled into a car, taken to a forest or wooded area. He was then tied to a tree with blue nylon roping.
"Petrol was poured on to him and into his throat. He was then set on fire whilst tied to that tree.
"The rope burned through. He was still alive. He stepped from the tree a short distance, still alight, and there he was to die."
The court was told Mr Clarke, of Elizabeth Way, had watched Severance about a year before Mr Everitt was killed.
"When Clarke watched that DVD he made a comment to this effect: 'Wouldn't it be wicked if you could actually do that to someone in real life?'," Mr Khalil said.
The jury was told that the woman who watched it with Mr Clarke was "shocked" at the remark.
Jurors heard that Mr Clarke, Ms Chandler, of Lancaster Road, and Mr Stewart, of Nelson Road Central, all played a part in the murder.
The trio confided in various friends and family and were arrested shortly after Simon went missing, jurors were told.
The trial is expected to last up to four weeks.