Map Confusion

Thomas is going to a birthday party tomorrow for a friend from school. On the way home today, he asked me where Aiden lived. I told him he lived in the north part of our city and we lived in the south part. He said, "Huh?" So I drew a map in the air and said, "Aiden lives up here and we live down here." He then said, "Oh, you mean he lives up in the sky and we live down on the ground?"