Janelle had mentioned this system before, but this was my first time seeing them in action. In response to my obvious fascination with the device, one of my fellow teachers remarked, "You know that some farmer came up with that system. They always come up with the best practical inventions." I don't know who actually came up with the idea, but I have to admit to being impressed.
[editor's note: I had to pause writing this for a couple of minutes because Janelle just came home from work and heard a growl-like sound outside, so she made me get on my slippers and stand in the cold while she put on the windshield cover. We think it might have been an engine starting, but I know she was thinking "bear" even though they are all hibernating comfortably now.]