Sunglasses and a pocket mirror...
LOL!
1. Obtain a laser and a friend with a pocket mirror, have them stand 200 yards down the road and try hit you in the face with the reflected beam while avoiding being hit themselves.
2. While wearing a pair of sunglasses, aim said domestic laser at your own face and try to avoid eye damage.
Sound stupid? Yes it does. Green domestic lasers should only be viewed with diffusers or a hundred bucks plus of safety glasses because they will damage your retina at power levels of 100mW or less, making the Gallium-Yttrium 300 times more powerful at least.
Its not just the light from a laser you have to worry about, its hot too. Legal lasers sold on the internet can be coaxed into popping balloons and lighting matches when focused down to 1/8 inch beams - a 2 inch beam 300 times stronger would fry more than a retina.
