Glad your well mate ...like i said you were going well at the top.Just like Ian Hughes at the finish mind,these things can come over you very quickly.He was not even running and went from fine to very ill pretty damn quick.
I'm just pleased you were on a grassy area when it came on..to stumble that dehydrated on a rocky section could have been very nasty.
Just have a good rest and rehydrate over the next week and work your way back slowly,just see how you feel.
I think another station half way down might have helped,although how many would have used it is a different matter !