This is the heart-stopping moment a teenage climber dangled more than a hundred feet above ground from a crane being used in the construction of the Aberdeen Western Peripheral Route (AWPR).
Elvis Bogdanovs and Robbie Borthwick filmed themselves breaking into the site at Milltimber and scaling to the top of the giant machine.
Last night a health and safety chief called for police to take action against the duo and a security review of the area was launched.
In the footage Mr Bogdanovs can be seen walking along the sheer edge before lowering himself down so that his feet are swinging in mid air while Mr Borthwick captures his death-defying stunt on camera.
And at one point he is pictured swinging from the structure supported only by his fingertips on his right hand.
The sheer drop below the pair is further emphasised in the footage as cars travelling on the nearby A93 look like tiny ants in the distance.
Mr Bogdanovs, dressed in a blue top and beige trousers and carrying a backpack, is seen with a pair of headphones in his ears as he clutches onto bars at the top of the machine.
And in a terrifying video uploaded by the pair Mr Bogdanovs is shown waving his left hand into the sky as he carries out the stunts on the structure.
This was just one trick in the latest of a series carried out by the due who upload videos to their Freedom Movement website.
Earlier they were spotted on the arch above the St. Nicholas Cemetery on Union Street where Mr Bogdanovs performed a handstand while Mr Borthwick clung from the edge.
Mr Bogdanovs also uploaded a picture of himself on top of the St Margaret of Scotland Church in Aberdeen city centre.
Further images uploaded to a social network site show him dangling off a bridge over the River Ugie in Peterhead and on top of the Broadford Works building in Aberdeen.
Last night he revealed he was not worried about being contacted by the police and said he did these activities for “self-satisfaction.”
The 18-year-old from Peterhead said: “It’s about the sense of achievement and the development of fear.
“This stuff isn’t done for publicity, fame or anything like that.
“I do it purely for self-satisfaction.
“I would extremely urge others not to copy myself or Robbie.
“Everything has a risk, and people need to be smart enough to know them.
“People won’t bother doing stuff like this unless they’re confident, and have the training in it.”
He added: “If we do get spoken to it will only be that, spoken to.
“Police don’t tend to waste time on a bunch of athletes, which is lucky for us.”
Last night Martin Greig, the chairman of the Aberdeen Community Safety Partnership, urged officers to take action against the individuals.
He said: “These activities are extremely foolish and irresponsible.
“It is appalling that buildings and property have been broken into and misused by these individuals.
“This misbehaviour is dangerous and unacceptable.
“With these self-promoting activities it is possible that other people could look to copy them.
“There is a potential for damage to the properties and I would call on the police to take action against these individuals before others take foolish risks.”
A Transport Scotland spokesman said the security of the site was under review.
He said: “We are aware that two individuals gained access to the project site, outside of working hours, breaching the strict security measures that the contractor has in place.
“The contractor is reviewing its security measures to understand if further safeguards can be installed where individuals choose not to observe the clear signage and site boundaries.
“Health and safety is paramount to Transport Scotland and Aberdeen Roads Limited, the contractor for the project.
“We strongly encourage all individuals not to enter the project site for their own safety and that of the workers.”
Last night police said they were unable to comment on the matter.