Shitty Mcgraw. Nasty A.F.

     Few things scare me more than shitting myself.  Very few.  There is really only one. (2 if you count bears, but you aren't counting, right?) Ok so the one thing that scares the literal and figurative shit out of me, is shitting myself during my first marathon.  Why would I have such a hideous and revolting thought? Because of this guy:

He shit himself during a marathon and kept on running like a gawt damned fool!  Talk about determination (or sheer stupidity)!  What ever you want to call it, I gotta give it to  him for finishing the race, albeit in 21st place.  I suppose I would have kept running too.  The only thing worse that being know as the runner who crapped themselves in the middle of a race with flash bulbs blinking and fellow runners jeering, is being the runner with with brown goo oozing out of your Nike shorts AND being a quitter.  I wish I could say that this wont ever hapen to me but 2 facts keep me from makeing such a staement: 1. I poo ALL the time.  after every meal, and at least 3 times a day.  2. Runners trots hit me at mile 5. Every. Time.  So what Do I do? Now that I have found this sport, I can't give it up, but I also dont want to end up like the poor schmuch above.

Thanks you Shitty Mcgraw for scaring me crap-less. Literally. 

Any advice?
Have you ever crapped yourself during a long run?