In 1968, the American athlete Bob Beamon, made a jump that many thought would never be bettered.
"As I struck that lightboard, I went up over six feet... and then I'd landed at this distance that was described as a freak."
In a single leap at the Mexico City Olympics, he improved the world record by more than half a metre. His new world record for long jump was 8.90m.
Sporting Witness speaks to Bob Beamon and to Lynn Davies, a Welsh long-jumper who saw the feat.
This programme was first broadcast in July 2012.
Picture: Bob Beamon's long jump at the Mexico City Olympics in 1968, Credit: Douglas Miller/Keystone/Getty Images