A schoolboy was hit with a hammer in an attack resembling a Quentin Tarantino film, a court has heard.
Mr Webster suffered brain injury
Henry Webster, 16, was punched, kicked and hit repeatedly on the head on a tennis court at Ridgeway School in Wroughton, Wiltshire, in 2007.
He suffered three skull fractures, one of which caused brain injury.
Two men aged 19 and 18 and two boys aged 15 and 16 are appearing at Bristol Crown Court charged with inflicting grievous bodily harm.
James Patrick, prosecuting, said: "For those there, it made a sickening sight, the sort of thing which you would expect to see in a Quentin Tarantino film - certainly not at a school in a village in Wiltshire."
Mr Patrick said a fight was arranged in January last year, after Henry had "barged" into a group of boys in a school corridor.
"It was to be a fair fight. A one-on-one - or so Henry thought.
"But he had not reckoned on the fact it was not to be one-on-one. As he came into the playground he was attacked by a group.
"He was knocked to the ground, he was kicked, punched and repeatedly hit over the head with a hammer."
Paramedics described his injuries as life-threatening, the court heard.
The trial continues.