4 dead people in the back

Yesterday during the post-school snack moment, my son said, "Mom, if the center of the earth were to explode the only things you would need to fix it are: a couple metal pipes, a guy, a girl, and four dead people in the backseat." I am unsure of the train of thought that lead to this great conversational moment...........I am sure whatever was going on in his mind was awesome though.