I should have seen this coming.
Olivia tangled with an elliptical machine at a friend's house yesterday, and tonight when her foot was looking worse and she still wasn't walking on it, we went in for some x-rays. The triage nurse thought Olivia needed a wheelchair, and for the next 15 minutes, all the patients in the waiting room were treated to, "I've been practicing in my Grandma's chair," as she rolled herself past them and experimented with cornering techniques.
Even the doctor was certain something was broken, but in the end it's all intact, just badly sprained and bruised. An ace bandage, four princess stickers, one "Mind your manners and quit sassing the x-ray tech!", and several animal cookies later, we were back home.
I suppose now that she's fulfilled that dream, she'll go back to asking about Disneyland.