Cool WebSite

While stubling across the web, I cam across a cool website about some person who uses a self built "solar death ray" to burn/melt/physiclly deform things like a floppy disk, rubber duck, twinkie, etc. Two Questions:

1. Why on earth would he build something like this
2. How come the Combined force of all that solor energy hasn't destroyed an unintentional target, i.e. Bike, Self, House, etc?

This website is located at http://www.solardeathray.com/. Check it out Note: This will be added to my cool WebSites List as soon as I get the Sidebar Issues worked out.