A son has described seeing his father fall to his death on their farm near Moffat in Dumfries and Galloway.
Alistair Davidson, 32, was giving evidence at an inquiry into the incident in January last year in which 62-year-old Willie Davidson died.
He said his father had been working at the top of a silage pit in a shed.
"My father's feet got tangled in the plastic sheet," he said. "He shouted he was falling. I saw him go over the edge and then saw him on the ground."
He rushed to help him and called emergency services to Poldean Farm.
He was given instructions over the telephone on resuscitation before the arrival of paramedics who carried out CPR but found Mr Davidson had died.
Mr Davidson, of Beattock, was involved in the partnership of WJ Davidson, and worked with his father on two farms.
He described how throughout the summer grass was piled into the shed and used for feeding stock in the winter time.
Air had to be excluded to convert it into silage and it was covered with plastic sheeting which was pulled back as it was used.
The two of them had started moving sheeting to the side when the accident happened.
Paramedic Robert Lowe told the inquiry that when he arrived first responders were already there.
Mr Davidson, who had significant head injuries, was not breathing and there was no pulse, but they continued with CPR but got no response.
The sheriff will give his findings at a later date.