An 11-year-old schoolboy died after crashing a powerful quad bike while helping out on the family farm, an inquest heard on Tuesday.
Kieran Horn died from injuries suffered when the 400cc Suzuki FSI King Quad crashed in a "rutted" cow field while he was on his way to help move an electric fence.
The inquest in Exeter heard it was an activity that he had carried out extensively and that the energetic primary schoolboy, a keen horserider, runner and triathlete, was an experienced quad bike rider and "mature beyond his years".
But he was not wearing a safety helmet, although one was kept for riders at the farm.
He was discovered by his father Charles Horn in Eight Acre Field at New Venn Farm at Lamerton, near Tavistock in Devon, at around 5.45pm on March 16 last year after not returning from the task.
In a statement read to the jury of five men and four women, he said Kieran had asked to help out after coming home from Lamerton Primary School and "was not being rushed or pushed to finish quickly".
"From the gate I could see the quad bike at the end of the field 200m away on its side," he said.
"Kieran was on the far side of the bike, face down and not moving. I rolled him over and his face was purple. I put my cheek to his face and could not feel his breathing."
He denied statements from emergency services that he had told them he found Kieran trapped under the bike, saying he was five feet away.
He described picking his son up and driving him back to the farm on the quadbike.
Kieran, who has a six-year-old brother, was pronounced dead at the scene by paramedics a short while later despite efforts by his father and them to resuscitate him.
His mother Elaine was visibly upset during the proceedings at Devon County Hall.
His grandfather, Stephen Horn, told how the youngster had been taught how to ride the quad by him and Charles, and had also been shown a quad bike safety video.
"Kieran had carried out this task maybe 50 times. He asked to take the quad bike and I had no hesitation in letting him take it," he said in a statement read to the jury.
"I had no reason to be concerned. He drove off in his usual steady way.
"Kieran was mature beyond his years. He was on the farm working for all his life. I never saw him fooling around. He was well-aware of the risks with quad bikes and farm machinery."
Devon and Cornwall Police Pc Philip Rowan-Smith, who examined the crash site, said marks in a furrow could have been made by Kieran as he rode in the field.
"If the mark was caused by the quad bike it would appear it was following the edge of the furrow, which could have caused an instability," he said.