So the bad news is that I had to give up 15 minutes into the run. The good news is I have a chance to strengthen my 'don't quit' muscles ;-).
It just wasn't happening - my iPhone battery died so I had no music, I turned Laura off to preserve battery life, it was really hot out and I started off *sprinting*. Numptyness all around really.
I had to stop for a 20 second breather after 5 minutes and then again at 15 minutes, the bottom of my legs were burning (shin splints I think), my lungs had fallen out a few minutes before and you know that fuzzy/tingly head you get when you over-exert yourself in the heat - yep, check.
All in all, I thought I was going to do some damage if I carried on so called it quits.
I haven't given up though! This is the first time I have had to abort mid-run (I had a delay due to illness a few weeks back), and it was quite humbling, which is good for my 'reality check'.
Now I need to decide whether to try again this evening so I can graduate on Friday or delay until tomorrow/Friday...
I am pleasantly surprised at how 'unbothered' I am at 'failing' this run - usually this sort of thing can knock me down/sour the whole experience, but hey, giving up really isn't an option now (it really _is_ addictive isn't it :-)).
I think I will try again this evening if I feel up to it as this weekend is a birthday party I share with a few relatives and graduating this program was my present to myself (and cue the wife: "as opposed to the garmin watch, the running shorts, trainers, t-shirt, apps").