Tonight was the first night that the temperature gauge on my car engine went backwards, showing that even as I drove alone my car was getting colder rather than warming up.
It happens every year, and once winter really gets going it'll happen nearly every day (unless I let my car run for 10 minutes before getting into it...and even then it might happen anyway). But the first time it's always a bit of a shock. One minute there are two or three dots there (it's digital). I'll glance away and look back only to find there's just one dot left. Sometimes it happens at a stoplight--during the time I sit there, my car gets colder. Sometimes it happens while driving (as it did tonight) which is even more shocking somehow. I mean, the car is moving and still getting colder!
Intellectually, I understand how this happens. I realize it often has to do with how high the heater is turned on to defrost the windows. I know about the physics involved.
But it's still shocking when it actually happens.