Car windows are supposed to shatter when a crack or fracture occured, for safety reasons. It also shattered because of the sudden change in temperature. Most northern climate people are well aware of this.
I've seen this with one car that went into the carwash when it was 5 degrees and the rear window shattered as soon as the warm water touched it, he ended up soaked and wet and cold.
One morning I've also witness a lady who didn't have an window scraper, she turn her car on and ran inside. I thought see was gonna let her car warmup, 3 minutes later she came out with a steaming pot of water. I knew exactly what was gonna happen. She stood next to the driver mirror and poured away. All you here was tick and tacks. You know what happened there.
Here's something reallly neat if yopu live up north. When it's real cold out like 0 degrees F or lower, boil some water till it's bubbling hot. Take the boiling pot outside and toss the hot boiling water into the air and watch it vaporize, not a single drop left, well maybe a little.
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