White jodhpurs and a muddy riverbank.....guess what happens.

Hi, as you may know I don't get much chance these days to indulge in my messy activities, however today I had the chance to while out visiting in the rural districts.
I knew I would be going near a river with mudflats, and I also knew where I could park the car down a small lane and access the river bank with no problems, and no overlooking houses.
I put on a pair of white jodhpurs under my normal clothes, then when I got to the river I removed my normal clothes. I had taken some tracksuit bottoms to put on after I had got muddy, as there is nowhere to clean up.
I had planned to simply wear the tracksuit bottoms over the mudded jodhpurs until I got home, then shower and change.
I arrived at the car-parking place, there was no-one else around so I took off my normal everyday clothes, and set off down the river bank top to where the mud was nice and easy to reach. This involves a walk, my reckoning on getting muddy with the thick mud, not too sloppy and wet, meaning I had chance to dry off a bit before covering myself up with the tracksuit bottoms.
I reached the place where there was not too much distance between the built-up bank and the water line (in some places the distance between the built-up bank and the water line is 1/4 mile, as the river is wide and straight it means you can be seen for a long way off).
Here is a picture of me on the river bank, ready to get muddy.
Now for the next part, I want you all to guess what happened next, the nearest guess wins a virtual prize, answer will be shown in the next couple of days.
I knew I would be going near a river with mudflats, and I also knew where I could park the car down a small lane and access the river bank with no problems, and no overlooking houses.
I put on a pair of white jodhpurs under my normal clothes, then when I got to the river I removed my normal clothes. I had taken some tracksuit bottoms to put on after I had got muddy, as there is nowhere to clean up.
I had planned to simply wear the tracksuit bottoms over the mudded jodhpurs until I got home, then shower and change.
I arrived at the car-parking place, there was no-one else around so I took off my normal everyday clothes, and set off down the river bank top to where the mud was nice and easy to reach. This involves a walk, my reckoning on getting muddy with the thick mud, not too sloppy and wet, meaning I had chance to dry off a bit before covering myself up with the tracksuit bottoms.
I reached the place where there was not too much distance between the built-up bank and the water line (in some places the distance between the built-up bank and the water line is 1/4 mile, as the river is wide and straight it means you can be seen for a long way off).
Here is a picture of me on the river bank, ready to get muddy.
Now for the next part, I want you all to guess what happened next, the nearest guess wins a virtual prize, answer will be shown in the next couple of days.