National Geographic has a fun little tip about how to break a car window. Now, why would you want to break a car window? They say because you might need to get inside in an "extreme emergency," aka here's a quick way to break into a car.

There are a couple problems with this video. First, to demonstrate that breaking a car window isn't as easy as you might expect, the host gives another guy a rubber mallet. Because, you know, THAT MAKES SENSE. Rubber + car window = shattered glass? It doesn't help that the guy is swinging that mallet like an uncoordinated 7-year-old making his first attempt at Tee ball. Problem No. 2 lies within his cute little magic trick. He pulls out a spark plug, breaks the porcelain part, and throws that at the window, which instantly destroys the glass. He's all like, "voila! Look how easy it is!" Yeah, because everybody has a spare spark plug lying around. Sure thing, buddy. 

Now, disregarding all of that silliness, the point of the video is that a very small piece of porcelain can actually break the glass very easily. As the host explains, that is because side car windows are made out of tempered glass, which is resistant to bigger, blunt-force hits. But the tip of a small piece of porcelain has a very hard point on it, which allows it to find a braking point. And as you guys probably know by now, most car windows these days are made to shatter when one part is broken. 

So, now you know, and you won't have to look like the Tosh.0 guy below:

Tosh.0
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[via Digg