While waiting for Leesha outside her school, I allowed the Littles to play inside the van. They were climbing over the back seat into the trunk area.
I heard a large THUD, and asked; "What was that?"
Jack responded; "I'm okay. I bonked my head, but I can still remember my birthday and where the stairs are."
I let the comment go for a while, but returned to it later. "Jack, where did you learn that?"
"I just know it."
The part about remembering a birthday is good to determine if there's a head injury, but the stairs portion baffled me.