A teenager told how a girl gang sexually abused him and "bayed like a pack of hyenas" as they filmed it on a mobile phone, a court has heard.
During a three-and-a-half hour ordeal the youth was punched, kicked and beaten with a broken broomstick, the Inner London Crown Court heard.
The victim, 18, allegedly owed money to one of the girls who dragged him away from a market in south-east London.
Four girls, the alleged ringleader aged 16 and three aged 17, were in the dock.
The 16-year-old has admitted assault, but denied charges of kidnap, false imprisonment, robbery and causing a person to engage in sexual activity.
The other three defendants, who were not charged with kidnap, pleaded not guilty to all the other above charges.
Bayed like 'hyenas'
The victim, who was 17 at the time, said he tried to repeatedly to call 999 as he was dragged away from Woolwich Market on 8 March last year.
On the way, one of the girls called the others and took him to a block of flats. Seven girls then attacked him, he said.
"The one who had hold of me said: 'This is the one who owes me money'. Then there were punches coming from all over the place... they were baying like a pack of hyenas," he said.
The girls hit him with a broken broomstick, which caused damage to his kidneys, and made him to strip down to his socks, the court heard.
He alleged they also forced him to perform sex acts while they filmed.
The gang also took his mobile phone, credit card, Oyster Travelcard and £2.
The victim told the court he was "embarrassed" by the whole ordeal and did not report it to police for weeks after.
He went to the police after his family members were sent the video footage of it but initially claimed four men were involved in the attack.
The case continues.