Or not staying still.
A couple of weeks ago I attempted potty training for 1.5 days. Collin was VERY into it for about half a day, and the other part, could care less. Other than showing me everywhere in the house he had peed besides the toilet. We'll try again soon, but had to get a pic in his little underwear.
It was cold one day awhile ago, so I bundled up Collin in the "full out play" outside gear with boots and everything. He looked huge in all that clothing :)