DNF - Did Not Finish - a phrase that for some reason makes some runners feel like a failure. It means you quit. It means you weren't mentally or physically strong enough to push through things when the going got tough during a race. It's even worse when you were well within the cut-offs, when you're not injured, or when technically speaking there was really nothing wrong with you and you could have continued if you were willing to push through several more hours on the trail, regardless of the continuous vomiting that is sapping every ounce of your energy and not being able to keep food or fluids down. Sure, the body will eventually sort itself out, but I like to run for the fun of it and when it stops being fun, no matter how much you try to convince yourself otherwise, that is the time to stop. Let's go back a couple of months. I had a great race at Iron Legs. It certainly wasn't pain free, there were times when I felt dizzy and out of sorts and it got pretty...