I remember once having to take a dump in a field, mid run.
All the cows in the field seemed dead interested and all crowded in to take a look. You simply cannot underestimate how intimidating 40 odd cows, encircling you and closing in for a better look can be. Seeing as my attempts to move the crowd on by, still in the squat position, waving my arms and optimisically shouting "shoo!", didnt work, i sensed all was not well and quickly made a decision to jump over the wall.
Once over, the group of jolly ramblers on the other side of the wall all did their best to be very British about the sight of a man jumping over a wall with his shorts round his ankles and simply looked into the distance as they passed and said "morning".
The worst mid run poo was outside an office in an industrial park in Leeds. I'm not proud of it but needs must.
Edited: 21/12/2011 at 00:31