One of two boys who allegedly conspired to blow up a school asked a teenager to buy hydrogen peroxide so he could "make small explosions", a court has heard.
One of two boys accused of plotting to blow up his former school told a friend he wanted to come back and "shoot 'em all up", a court has heard.
Phillipa Knowles also told Manchester Crown Court Matthew Swift, 18, said she should have sympathy for the gunmen responsible for the Columbine massacre.
Emily Dutton, who had known Matthew Swift for two years, told Manchester Crown Court the "grinning" 18-year-old said even friends would not be spared.
He and Ross McKnight deny conspiracy to murder and cause explosions.
He and Ross McKnight, 16, both deny conspiracy to murder and conspiracy to cause explosions.
They allegedly plotted a killing spree on the 10th anniversary of the massacre at Columbine High School in Colorado.
The prosecution alleges they planned an attack on Audenshaw High School.
'Project Rainbow'
It is claimed they aimed to launch their attack on the 10th anniversary of the massacre at Columbine High School in Colorado in the US.
Miss Knowles said Mr Swift had comforted her after watching a documentary about the Columbine massacre, which took place on 20 April 1999.
Miss Dutton told the court she asked Mr Swift if he would kill her.
She had been upset by the number of innocent victims shot dead by the killers, Dylan Klebold and Eric Harris, but Mr Swift told her the gunmen deserved sympathy.
Mr Swift and Ross, 16, have been accused of plotting to embark on a secret plan, codenamed Project Rainbow.
It is alleged they planned to bomb Crown Point North shopping centre in Denton then carry out a Columbine copycat attack at their school, Audenshaw High School in Greater Manchester.
The jury was told the boys planned to murder teachers and pupils
They were arrested in March, just over a month before they had planned to carry out their killing spree.
During the second day of their trial jurors heard evidence from a number of young witnesses, peers and friends of the accused.
Emily Dutton knew Mr Swift for two years while they studied at the school and attached college.
She told the jury that in a conversation about college life a "grinning" Mr Swift told her that could not wait to leave [school] and that he was going to "come in and shoot everybody up".
"I really did not know what to say," Miss Dutton said.
"I said, 'What, even me?"'
"He said, 'Yes. Mates get it first'. We both kind of went silent."
"He said, 'Yes. Mates get it first'. We both kind of went silent."
'Korean guy'
She also admitted they remained friends despite this and at the time she did not report his threats to the authorities.
Another witness, Carl Powell, told the jury Mr Swift, who had the username Eric Harris, after one of Columbine gunmen, on an online gaming website, talked about the massacre with him.
It is alleged Mr Swift and Mr McKnight, a current pupil at Audenshaw, plotted an attack between November 2007 and March 2009, codenaming it "Project Rainbow".
"He did express interest in it, not in a way saying it was fantastic or condoned it, more explained why they did it," he said.
The jury was told the boys planned to murder teachers and pupils
"From my recollection it was just that they were bullied or something like that.
They are also accused of planning to bomb Crown Point North shopping centre.
"We used to talk about the Korean guy, he just mentioned that once.
During the second day of their trial, jurors heard evidence from several peers and friends of the accused.
"He was just saying where the guy was coming from. Pretty much the same as Columbine, boredom."
One of the witnesses, Phillipa Knowles, said Mr Swift had asked her to buy hydrogen peroxide so he could "make small explosions".
Mr Swift, whose mother died when he was 11, lived with his grandparents and had never known his father.
She told the court he had also comforted her after watching a documentary about the Columbine massacre, which took place on 20 April 1999.
The court heard that in a statement given to police Miss Knowles said Mr Swift was more likely to harm himself than others, had quite a lot of issues and that he may need counselling.
Dylan Klebold and Eric Harris shot dead 12 students and one teacher and injured 21 more at their Colorado school.
Ms Knowles had been upset by the number of innocent victims murdered by the pair, but Mr Swift said it was the gunmen who deserved sympathy, the jury was told.
The court heard that in a statement given to police Ms Knowles said Mr Swift was more likely to harm himself than others, had quite a lot of issues and that he may need counselling.
