(Left) The moment the security guard was kicked in the head. "Some people had entered the event, they're believed to be fence jumpers, or they entered unlawfully," Senior Sergeant Booker said. "A security guard, who was engaged by the organiser to work within the event, was talking to a person and they ended up in a scuffle on the ground. "Another male person has come out the crowd and kicked him in the head." The Hazelmere man and the teenager involved in the scuffle are believed to be known to each other.

The injured guard tries to regain his composure. Credit:Facebook The 18-year-old also faces a charge of trespassing which carries a maximum penalty of $12,000 and 12 month imprisonment. He will appear in Perth Magistrate's Court on March 16. Festival goers come to the guard's aid. Credit:Facebook The alleged attack on the security guard was caught on video by an onlooker who shared the footage on Facebook.

It shows a young man dressed in black wrestling with a security guard on the ground while dozens watch on. Another young man dressed in white then runs up and kicks the security guard in the head - the guard then collapses face first in the dirt, appearing to be momentarily knocked unconscious. The teenager initially involved in the wrestling then appears to hit the security guard while he's lying flat on the ground, before grabbing his sunglasses and bag and running off. A number of young people then rush to the aid of the dazed guard as he struggles to his hands and knees. On Monday afternoon, police said they had made contact with a young man in connection to the attack through his mother.

It is believed the man involved may have been among a number of people who scaled fences to get free access to the event. Facebook users were disgusted by the disturbing video. "What a piss weak scumbag", one posted. "Nothing warrants this," said another. Even acclaimed Perth writer Reg Cribb posted a comment on Facebook on Monday morning, saying how concerned he was by ongoing cowardly behaviour of people at music festivals.

"Okay I am sick of seeing footage of people getting kicked and punched by cowards at music events or late night Northbridge or wherever," he posted. "And I have seen it many times happening on the streets too. So I am going to put it to you. "Which one are you? The person who steps in and tries to stop a fight or stands around like a tool and films it happening. En masse , people need to step in and pounce on these cowards and shame the f*** out of them. How come everyone stands around like stunned morons watching some reality TV show. "Its [sic] real folks, its [sic] happening right in front of you. Do something or hang your head in shame. Unless the perpetrators are brandishing a knife or a weapon of some description it is everyone's problem. "God help us if Perth became a disaster zone. From what I have seen, it would be every man for himself."

Seven news reporter Grant Wynne said he spoke to the security guard on Monday morning. "It's a pretty sickening act to watch as this guy runs up and boots the security guard in the face," he told Radio 6PR. "He's actually a grandfather and was equally shocked this could happen. He tells me he originally went to confront one of the guys because they didn't have a wrist band on. "It might be suggested that these two that are allegedly involved in the incident might not be under 18 and probably shouldn't have been at that music festival in the first place." Mr Wynne said the man was now feeling alright after getting slightly concussed on the night.

- with Heather McNeill Follow WAtoday on Twitter