There are loads of videos on YouTube of people driving along the road minding their own business. This is because they've just bought a dash-mounted camera and are, more often than not, testing it.
The reasons behind such a purchase may be complicated or fairly simple, but the chap in the video below was saved $500 by his – reason enough to invest.
You'll see in video that the car in front of our intrepid driver slows to a halt on the freeway, the driver of the halted car then gets out and tries to extort the chap he forced to stop on the highway for $500 for his damaged bumper.
Why? Because insurers always see the chap who runs into the stationary car as the ones at fault – unless there's video evidence of an obvious con going on...