By Matthew SchulzFebruary 25, 2009 04:28pmGRAPHIC footage of a youth's brutal bashing at a train station shows three attackers taking turns to kick him in the head.Detectives investigating the vicious assault say they are appalled by the level of violence, which left the 23-year-old man from Sunshine in Melbourne's west with serious head injuries.The man was beaten even after he handed over the backpack that appeared to be the motive behind the gang-attack.Transit detective Mark Sontag said he believed even the trio’s mates and family would not hesitate to turn them in, given the nature of the assault, the Herald Sun reports.The disturbing footage shows the slightly-built youth’s head bouncing on the concrete walls of the underpass as he is kicked time and time again by three men of African appearance, even after slumping to the ground unconscious.Afterwards, one of the attackers appears to clap his hands in what appears to be a celebration of the sickening assault.“Even the perpetrators families’ would be disgusted by this,” he said.Police said there was nothing of real value in the victim’s bag.According to the police the unemployed Sunshine man was kicked unconscious and left for dead in the Sunshine Railway Station underpass at 12.10am on Tuesday morning.The victim initially tried to ignore the three attackers as they tried to engage him in conversation on the train and the platform, before surrounding him and knocking him to the ground.“This is a pretty appalling attack on a vulnerable young man who was by himself at the Sunshine railway station,” Sen-Constable Sontag said.