what happened is anyones guess. I did the 2ft jump on a sloping decent fine - where I landed was about 1 foot lower than the bottom of the jump, so a 3 ft jump in total. I seem to have failed to stop correctly from what I recall. I know I nailed the landing fine. I think I may have 'over done' the braking and was left with 3 options. 1 drop the bike to the left uphill, 2 drop the bike to the right down hill, 3 over the bars. never been over the bars, never intend to, dropping the bike and me downhill seemed easier than uphill but not as sensible. the fall did not actually hurt (ironically it was in a grass field so I have no idea how my helmet broke quite so badly) and I have yet to really work out what happened to the helmet - current reply is that my bike and I had a difference of opinion as to how many pieces my helmet should be in.
see this is what happens when you cheat on your triban.
let this be a lesson to us all.........