Wise Guy

[dannibear]

As a 7th grade biology teacher, I was teaching my class about the flow of blood in the body. After my lecture I asked the class the following: “Why is it that if I would turn upside down, my face would turn red since the blood would flow to my head, but when I stand upright my feet don’t turn red?” I was taken aback when a boy blurted out, “that’s cuz your feet aint empty!”.