SICK adults watched – and even encouraged – a 15-year-old boy to jump to his death from a tall building with a homemade parachute.

Schoolboy Bogdan Firsov died yards from his mum, who was among his cheering supporters, after leaping from the roof of the 14-storey-high block.

The crazy, fatal daredevil stunt occurred in the eastern Ukrainian city of Makiivka.

People filmed as Bogdan’s makeshift parachute failed to open properly, and he plummeted to the ground.

In a heartbreaking video, the boy can be seen standing of the top of the abandoned building with his arms outstretched.

He jumped over the edge as friends standing close by filmed him, according to local reports.

As he fell, his homemade parachute can be seen trailing behind him in the footage, but it failed to unfurl properly during the 140ft plunge.

An unnamed eyewitness said: “A crowd of people was there and nobody tried to stop him. They only filmed.

“People are not human any longer, they have lost all common sense.”

He added: “It happened right in front of my eyes. The boy jumped down with a parachute.

“He flew down and hit the ground with his back. It was really tough.”

Other relatives joined the boy’s mum in watching, filming and photographing the horrific jump.The teen jumps over the edge of the building as friends – and family – film him

They appeared to be “encouraging and cheering him on” – yet not one person bothered to alert cops to halt the stunt.

The mum – whose name was not given – was “so shocked by his death that she refused to leave the spot”.

But experts said that even a full working parachute would not have saved him.

Newspaper Fakti reported: “The lowest possible height for a jump with a parachute is 70metres – a building of at least 25 storeys.

Tragically, his homemade parachute failed to open

“And even then it would have been a dangerous jump.”

Another newspaper said: “Dozens of people watched him doing it, including his family [and] his mother.

“They were filming the jump but nobody was brave enough to stop this young ‘extreme-lover’.

“Nobody called the police, and so we see the result.”

Bogdan had waited two minutes on the rooftop before leaping, said witnesses.

The boy wore a helmet and there was some kind of “padding” on the ground below, but he died instantly.