Oh, sorry!

Joshua's latest maneuver has been to run towards one of us (usually Caleb), shove us, and then flippantly apologize with a quick "oh, sorry!" We have tried to explain to Joshua that you generally only tell someone that you're sorry when you hurt them by accident, whereas he is clearly consciously being aggresive for the sole purpose of having an excuse to use the latest addition to his rapidly expanding vocabulary. Silly boy!