Constant Vigilance!

. . .it was a face unlike any Harry had ever seen. It looked as though it had been carved out of weathered wood by someone who had only the vaguest idea of what human faces are supposed to look like, and was none to skilled with a chisel. Every inch of skin seemed to be scarred. The mouth looked like a diagonal gash, and a large chunk of the nose was missing. But it was the man's eyes that made him frightening.

One of them was small, dark, and beady. The other was large, round as a coin, and a vivid, electric blue. (J.K. Rowling, Harry Potter and the Goblet of Fire, 184-185)

My interpretation of Mad-Eye Moody, from the Harry Potter series. Bye bye, Mad-Eye. . .