Another thing I've found out is that if your body loses enough energy in a marathon, it starts to digest itself!
So there you are, after 24 miles, nipples bleeding, limbs caked with diarrhoea, urine, vaseline, and then, after all that (which is, by the way, being filmed by the BBC*), you begin to self-cannibalise.
I'm having profound second thoughts about this marathon business.
On the up side, it's given me ideas for a series of films - Marathon Holocaust, Marathon Apocalypse, Zombie Marathon, I know What You Did Last Marathon, etc., etc. - that I think have potential.
* I assume it's an edited, propaganda version of the marathon that we actually get to see on our TV screens. To what nefarious end I know not.