Really sorry to hear this news Jon, as harland said, it can happen to the most experienced of us, and I'd put you up there in that group of walkers. Such a shame, so early in your C2C crossing as well.
I remember taking a tumble not too far from there on ’High Stile’ in front of Domtheone and Rhino, I banged my head slightly, but was lucky to get away with it.
Jon, I can only wish you a speedy recovery mate and that the op goes well. Hopefully you'll have another go at the C2C sometime in the future. In the meantime, look after yourself