In reply to graeme jackson:
I've found it .
John Long
Long joined teenage climbers John Bachar, Rick Accomazzo, Richard Harrison, Tobin Sorenson, Robs Muir, Gib Lewis (climber), Lynn Hill, Jim Wilson, and Mike Graham as founding members of an elite group known as the "Stonemasters"
https://en.wikipedia.org/wiki/John_Long_(climber)
Starting in 1980, Long began working for David Frost Productions, writing and producing ABC and BBC specials, including the International Guinness Book of World Records, which also became a long-running syndicated series. Moving into feature films in the 1990s, Long worked on the second unit for dozens of motion pictures, including the Rambo series. His novella, Rogue’s Babylon, was the basis for Sylvester Stallone's hit movie, Cliffhanger.
Post edited at 14:47