My new puppy was left alone while I dashed to the market. No more than 15 minutes home alone. I get home, bag in arms, unlock the door, and step in just as the smell hits me!
Little sweetie had pooped her body weight right in front of the door. So opening the door caused the door to act as a spatula skiffing across the pile to evenly spread it across the floor. And since I had a bag in my arms I didn't see it so stepped right into the perfectly spread poo.
Additional Question: Have you ever had to wash dog poop from the very bottom of a door?