RIP Kevin Ash. A tragic loss to his family, friends and colleagues.
It is always bad to hear this type of news, but anythig can happen to anyone at any time, a motorcycle is just a bit more dangerous than walking down the stairs or taking a shower, but people have died doing that too!
Personally I have never ridden faster than 120kms on a gravel road, and even then I scare myself and slow down again... gravel is just too unpredictable to want to go so fast!