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It's the video which will leave any parent of a teenager feeling ill. 

A group of youths in their school uniforms dangle their legs over the side of a rooftop, running, leaping and clambering down the edge of a ladder on the side of the building – even though there is nothing to stop them plummeting 140 metres to the ground.

For weeks an alarmed witness in a nearby building filmed the group as they returned to the scene, breaking onto the rooftop of the 42-floor Sydney high-rise in the CBD to run amok.

On Thursday at 4pm police were called to the apartment building on Cunningham Street, Haymarket and escorted two 22-year-olds and three 16-year-olds from the site.

'Rooftopping' is the alarming trend in which daredevils take great risks to take awe-inspiring images of themselves atop towering skyscrapers.

A teen dangles their legs over the side of the building with a terrifying 140m drop below them to Sydney's CBD

The footage shows a man in black hanging of a ladder with around 140 metres to the ground below

Other high-rises pale in comparison to the Haymarket building where the five ran amok

'Rooftopping' is the alarming, escalating trend in which people dare to put themselves at a great height to take awe-inspiring images - showing themselves hundreds of metres in the air

Authorities have issued a warning about 'rooftopping' on the Gold Coast ahead of Schoolies week 

The trend sees partakers take daring and dangerous photos perched atop skyscrapers

Partakers in the trend will go to any length - often breaking the law and risking their life - to get the shot

Just a small step in the wrong direction to the 140m death drop from the building in Sydney's CBD

Police were called to the site at 4pm on Thursday and escorted the three tens and two men from the building

The footage also shows the moment they run from security onto the rooftop, breaking out from an exit door

WHAT IS 'ROOFTOPPING'?

'Rooftopping' is a trend in which people post daring photographs showing them perched hundreds of metres above the street below, and frequently share them on social media.

Also known as 'skywalking' - the social media fad recently led to the death of one young man and put another in court on a number of trespassing charges.

The rooftopping trend emerged last year and has become somewhat of a global phenomenon. 

People will go to any lengths - including breaking the law and risking their life - to get the shot.

The men, both aged 22, were issued with criminal infringement notices for trespassing. 

The three minors escaped serious charges due to their age, with police opting to let the offenders go with a serious warning.

The boys and girls are seen dressed in their school uniforms as they climb over safety rails to put their lives in serious danger, just centimetres from the terrifying drop.

While filming their antics, the witness can be heard gasping and exclaiming in horror at the youths narrow escapes as they run just centimetres from the potentially deadly drop. 

Instead the schoolchildren appear to be totally carefree, clambering up and down ladders on the side of the building at great speed and risking their lives to take a photo of their legs dangling from the chilling height.

The footage also shows the moment they run onto the rooftop from an exit door, only to be dragged inside by security. 

Sydney City Crime Manager, Detective Inspector John Maricic is reminding the community that there are serious consequences for anyone who undertakes risky behaviours or trespasses.

'Not only might you end up with a criminal conviction, but you are risking injury or death,' he said. 

One of the youths risk their life to take a selfie of their legs dangling over the edge and the cityscape below them

The daredevil sits 

While filming their antics, the witness can be heard gasping and exclaiming in horror at the youths narrow escapes as they run just centimetres from the potentially deadly drop

The three minors escaped serious charges due to their age, with police opting to let the offenders go with a serious warning

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