LOL Im no angel by any means. I have yet to accidently set anything on fire but ive done a few controlled burning marks on some doors and furniture just to give my place the lived in laser look.:shhh: with all do respect to safety! Yes these class IV can sure start something fast, faster than your safety glasses will let you see. "Like I have to say this to all the laser maniacs". I have picked up a few good back stops though, not at Lowes but Home depot. I got a few ceramic 12'' by 12'' kitchen tiles and painted the backs flat black. One off them I siliconed it to a 10" by 3 ft. long round tube of the thick cardboard use for cementing posts in place, keeps it from rolling and it makes a descent tube to enclose and see the beam. Vanilla Gorilla on this forum gave me the idea. Im running out of things to burn though, well the fun things......By the way Pi, a "few" burn marks?What? Don't you use your lasers inside and leave burn marks everywhere like the rest of us do? :crackup: Just joking, I learned real fast that my class 4 lasers are a fire hazard, I only made a few burn marks. You can safely use your lasers inside, get a sheet of metal like from an old computer or something, or a concrete block or a brick or some ceramic tile, if you don't have anything laying around then go to a Lowe's or a Home Depot and look for something.