[benevolentWanderer]

Don't draw with your touchpad. It's a mistake.

Green line - the spinal column. EXCEPT in humans, leaves the skull at the upper back of the head. Doesn't curve very fast. (Re: humans - the connection point appears to have moved in the same period hominids gained skeletal changes associated with walking upright, so probably has something to do with that.)

Red line - there's a part of the neck/chin below the jaw, and it's at a different angle to the rest of the neck. Humans have this too!