Window tinting is a popular way to keep the sunlight out and your home or car cool. But how about one that can also keep you safe? Some windows are being treated with a special security film called Huper optick. Even after being hit repeatedly by a bat, the glass doesn't shatter. It just breaks up like a spider's web. The security film not only keeps burglars out, it also keeps out the heat and damaging UV rays. But it's not inexpensive. Huper optick runs between $10 to $14 a square foot. There's also another version of the Huper optick made just for vehicles. It costs about $150 more than conventional window tinting.