And to think, people used to kill other people with little more than rocks and sticks.
If you bought the fancy edition of Dead Space 2, you would have got yourself a little replica plasma cutter, one of the game's more memorable weapons. As is, it's useless, but this guy will show you how to turn it into a laser gun. That can set stuff on fire.
Seems the whole world has gone Portal mad this week. Artist Miles Donovan certainly has, coming up with these great schematic pieces showing how the guns actually work.