In my high school one of the girls left one of those magnifying makeup mirrors in the passenger footwell of her car. It was a hot day, so she cracked the windo

In my high school one of the girls left one of those magnifying makeup mirrors in the passenger footwell of her car. It was a hot day, so she cracked the windows a bit. Hours later as we were eating lunch the sun struck the mirror at just the right angle, and as we look over at the parking lot there's smoke billowing out of the car. Luckily there was no fire, but there was a line burned across the underside of the dashboard. It looked like someone had taken an acetylene torch to it.