Just this week .
I had a bizarre two tone poo.
So astonished was I , that i wanted to take a photograph to share with the world, but alas I did not have my phone with me.
It was about 7 to 8 inches long and one side was dark brown, the other a more light tan colour. Perfectly split lengthwise down the middle.
edit : to add pic.
Obviously I can't google tow tone poos while at work, but I did find this pic, The two colours on this fine ladies jodhpurs perfectly illustrate the two colours that I have been trying to describe..