He'll never live down this story

On Tuesday we had playgroup at a children's resale shop near our house. They have a big play area and couches for the parents. They're also very lenient about kids running around the store, so I wasn't worried when I didn't see Ben for a few minutes. Eventually I did go looking for him and found him sitting on a potty they had for sale. I thought he was just sitting on it for fun, to make his friend laugh, but then I noticed his pants around his ankles. And THEN, through his legs I noticed a very LARGE pile of poop in the potty. The boy who asks me to turn my back when we're in a public restroom stall had pooped right there in the middle of the store.