His friends watched in shock as the Port Chalmers youth appeared to almost pass out after landing on the stump.
"If it hadn't been for that stump he would have been in the death notices," Willowbank station officer Howard Weir said.
The area was a popular place for local teens, but "really was not a place for kids with no skills or equipment".
Mr Weir said a helicopter rescue was considered, and it was fortunate for the youth that senior firefighter Dave Palmer, a Fire Service rescue instructor, was working.
Mr Palmer said the youth was upset he had put so many people to so much trouble, including Port Chalmers volunteer firefighters, police and ambulance personnel.
However, Mr Palmer could not believe the youth had been climbing in an area used by rock climbers for practising, with no equipment.
"He was just millimetres away from a fatality. It is almost a vertical cliff."
The youth was placed in a rescue sling, attached to the firefighter's rope system and taken 25m to safety. He was visibly shocked and had large rips in his jeans. The youth was taken to Dunedin Hospital as a precaution.