I'd reckoned on the gremlins being mental but no dammit they were properly physical. Developed my first ever blister (well, whilst running anyway) in a weird sole / side of my foot place. And at 8.5k a ninja hip pain hit me. Stuff that.
I stumbled on in the kind of desperate way that cries out 'dude you really need to stop'. Took a sneaky look at run keeper during a late 'walk break' that was threatening to become - well, just a walk really. 9.62k. I actually gritted my teeth and let out a sort of 'Nnnnnnnnngg' sound (luckily I'd left the kiddies play area or reckon a few anxious parents would've huddled their kids close). Bam. 10.08k. Oh yes!