Hi nath,
Is that the only recorded death on a Greenie, it is the only one I have heard of but there may be more? Admittedly he was only 15 years old and maybe didn't have the sort of experience an older person may have.
I sold a Greenie Stallion (these had the gearbox) on ebay some years ago and once the buyer contacted me I knew there might be a problem because I knew the area where he lived was up in the hills. I said I didn't think it was a good idea because they were not heel and toe and if you ended up between gears with no brake you could end up in serious trouble. The brake on those was just a locking brake with a lever with a pin on it and a disc with a few holes in it. Fine if you are stationary but if moving the pin would not lock in. Anyway he took it and a week later he had had a big scare and managed to run it into a tree to stop it. Then he wanted me to see if I could fit a decent brake to it and that it when I fitted a hydrauilc disc from a pit bike or something to it. Works well but a lot of hours went into it