I heard about this in the news today. The Vdara Hotel, owned my MGM in Las Vegas, is equipped with a Death Ray. No no, not like the Death Star. This hotel uses sunlight to scorch its victims.
You see the concave surface of the hotel? There is a pool in front of the hotel and if someone sits just right, the sunlight gets focused and lights their hair on fire--no joke. In addition to burning hair, the Vdara Death Ray has been known to melt plastic cups and plastic bags. It makes me want to see it. I think I would try to put things in front of it to see if it would melt or not. Perhaps I would take part in a contest to see how long one could stand in the path of the Death Ray.