Some people have way to much time on their hands.
YouTube user styropyro recently unveiled his newest homemade toy, a 40W laser shotgun -- his strongest creation yet.
Equipped with eight parallel 5W laser beams attached to a large heatsink whose power is enhanced by magnifying lenses to create one big ass laser beam that's regulated by 24 LM317 drivers.
Call this thing the 'Proton Cannon'. If any of you guys are Iron Man fans, you'd know, that's a pretty powerful weapon.
Not reccomending anyone who doesn't know what their doing to try this at home. Just enjoy the fun vicariously through Styropyro, and subscribe to his Youtube channel if you want to see more.