[Between the head start and some stumbling on Walter's part (not to mention he doesn't know when Katara intends to stop racing), Walter lags a few feet behind her. They're not all that far from the house when Walter slows down more.]
Stop! That's enough!
[His tone isn't as sharp as it can be, but he clearly isn't intent on finishing the race.]
[action] o/
Stop! That's enough!
[His tone isn't as sharp as it can be, but he clearly isn't intent on finishing the race.]