An 18-year-old was punched, kicked, kneed and head-butted around 100 times in just two minutes in a shocking street attack.
The teenager, who asked to remain anonymous, was attacked as he walked along Buckingham Road, Shoreham, on October 17 last year.
He had his mobile taken and suffered facial injuries.
Now David Ayres, 19, of Farm Way, Southwick; David Shaw, 19, of Fishbourne Road East, Chichester; Lewis Berry, 20, of Test Road, Sompting, and a 17-year-old from Shoreham who cannot be named for legal reason have been convicted of attempted grievous bodily harm.
Appearing at Brighton Crown Court, Shaw also admitted robbery.
Ayres was jailed for six years, Shaw was given five years, Berry was sentenced to four years and six months and the youth was given 32 months.
The victim said: “The sentences they received are better than I expected.”
Detective Constable Jonathan Stadius said: “This was a really nasty, unprovoked and vicious attack by these four people on one person.
“The victim was lucky to escape with no lasting physical injuries as the intent to cause him serious harm was evident.”
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