A group of teenagers drank champagne before going out and attacking a French schoolboy, a court has heard.
It took the injured Erwan two hours to crawl home
Erwan Drouet, 16, who suffers from a brittle bone condition, was thrown to the ground during the attack last July.
Bristol Crown Court was told he then took two hours to crawl home in agony with a broken pelvis. He was taken to hospital and treated in intensive care.
Three teenagers have pleaded guilty to robbery, a fourth denies the charge. The case continues.
The student who was on his first visit to Britain gave evidence via video link from his home in France.
He told the court how when he asked his muggers for help they laughed and one of them threw him his phone card before taking his wallet.
The language student added that one of the boys threatened him with death if he spoke of the attack.
Giving evidence witnesses Joshua Cook, told the jury the group had been drinking champagne after a night out in the Clifton area of the city.
He said there had been a discussion about going out and mugging someone.
"After the attack I felt sick, I didn't want to look at it."
Two more teenagers who cannot be named for legal reasons and a third, Ashley Glastonbury, 18, of Bristol pleaded guilty to robbery.
A 17-year-old girl denies the charge.