You may think that textbooks are not funny at all. I thought so too. But then, I came across these diagrams, found in actual books. They are so bizarre (and real) that they will have you wanting to study science right away. These diagrams have no logic, and no sense, but they truly have some sense of humor.
As The Jackson Five one said, ABC is easier than Do Re Mi. And, let me tell you, seeing a bone coming out through the skin makes it even easier to know it’s a critical situation.
So that what it meant! I’ve been seeing people shaking their heads all my life, and I thought they meant “Yes”. Now I know why my mother hates me.