Yeah, today was supposed to be 14k, starting to work up to it, but at the end of that I felt fine so did another lap of the park, and at the end of that I was a bit tired, but thought I had another one in me, and at the end of that I was bloody knackered, but also only needed another 3km to hit the big shiny new milestone, at which point the sheer bloody-mindedness kicked in.

I promise not to accidentally a whole marathon.