Imagine the following scenario, you are at the Olympic Marathon Trials. You are running the race of your life but you've really got to go to the bathroom - #2.
There are two questions you basically now face.
1) Where do you go?
Do you just do it in your pants, or on the side of the road or in a portable toilet?
2) Once you go, do you wipe?
The Reebok Boston Track Club's Marty Hehir is used to making those type of decisions all the time on the fly as he's a busy man- father, med student and pro runner.
See what he decided here: