James Gosling, aged 24, was walking along the cliff top, just off Psalter Lane, Hunters Bar, when the rock crumbled and he plummeted to the ground below.
He had just stopped for a cigarette break on a cliff top bench when the rock gave way as he got up.
James, a music producer from Ecclesall, fractured his spine in four places but miraculously his spinal cord was not damaged in the fall on Sunday afternoon, meaning he will still be able to walk.
James, whose nose was also broken in the fall, dislocated his hip and lost consicousness after crashing to the ground.
When he came round his cries for help were answered by three men who had been at a nearby marital arts centre and heard him.
They men raised the alarm and an air ambulance was scrambled, but was unable to land nearby.
James was eventually taken to the Northern General Hospital by ambulance and remains there today.
Speaking from his hospital bed, James, known in the music scene as J.G, said he is lucky to be alive.
“I am really lucky to be alive. People have looked at how far I fell and said it is a miracle I am still here to tell the tale,” he said.
“I had sat down on a bench for a cigarette and got up, took a step forward and the rock crumbled and the next thing I knew I was at the bottom of the cliff and could not move.
“I must have lost consciousness and when I came round and started shouting for help, three men heard me and raised the alarm.
“I want to thank them for saving my life because if they had not found me I dread to think what would have happened.”