Not content to simply describe thermometric reality, human beings have felt the need to embellish things in order to more accurately reflect our oh-so-precious perceptions. Wintertime, a surefire method of exaggerating the cold is to tout wind chill numbers as though one's bare face was actually exposed to an uninterrupted stream of predicted wind-speed turbulence, walking into it at one-and-a-third meters every second. Don't slow down or turn your head: You will degrade the wind chill factor!