Here's the conversation S and I had in the car this morning:
S: Mama, what fell on the Mall of America?
Me: What fell on it?
S: Yes, what fell on the Mall of America?
Me: I don't know.
S: Yes you do. I heard you say it when there was no mail, what fell on the Mall of America.
Me: Oh, are you thinking about Columbus Day, when I said Christopher Columbus landed on the shores of America.
S: Yes, he fell on the Mall of America.
Me: No, he was on a boat and landed on the shores of the United States of America, not the Mall of America.
S: Oh. Why was he on a boat.
And the conversation went on from there.