Guy Built a Homemade Laser Gun That Can Light Stuff on Fire

Some guy posted a video of a homemade laser gun he made that's pretty sweet. The beam is huge, and he can actually light stuff on FIRE with it. The output of this laser is complete insanity, and is made up of 8 parallel 5W laser beams totaling to 40W. The parallel beams are manipulated with lenses, sort of like how a choke modifies the spread of a shotgun blast.