Where's the Poo?

So we have been working on Potty training Nate. It has been going really well except he won't poop in the potty. He is getting to where he will pee pretty consistently just won't attempt to poo. He is actually waiting until nap or bed,when he is wearing a diaper and unsupervised to do the deed. So Last night after the kids went to bed I went for a swim. When I come home and before I go to bed I always go in the kids rooms to check on them. So lastnight as soon as I open Nate's door I smell it. Very strongly but as I look at my boy I realize he is not wearing pants or a diaper. Uh Oh Not good. I look under all his covers no poop or diaper, under the bed, nope, under the dresser..Nope....In the closet...Nope. I call up Fred he looks in the same places, where could it be. Fred then notices that his Jammie s are on top of his dresser and he grabs them and sure enough the diaper is in them. He had taken it off post poo and put it up and went back to bed. Miraculously there was no remnant poo anywhere and he hadn't even wet the bed while he'd been sleeping without a diaper. It was a really entertaining event.