My grandmother bought me "Real Genius" when I was a kid

So, be honest, when you read this, don't you instantly think: "All you'd need is a tracking system and a large spinning mirror, and you could vaporize a human target from space!"

Followed by "How could you build that mirror!" Optionally accompanied by: image of angry young Val Kilmer hurling his keys at the large table where [I forget which: tracking system, spinning mirror, laser] used to be.

Some of my geekier friends and I are basically capable of Rocky Horror Picture Show-ing that movie.  I was *so* disappointed that college didn't really have chemistry geniuses making ice-rinks in the hallways out of ice that spontaneously melted into gas, with no messy clean-up.