And gives new meaning to "you'll shoot your eye out".
How To Turn a Mini Maglite Into a Laser
From the article-
"Using the laser from a DVD burner, this instructional video shows you how to create a hand-held laser that is powerful enough to light a match and pop a balloon. There's some soldering involved and the Maglite's bulb housing needs to be drilled out to fit the new laser diode, but with some basic skill, most people could do this. Just plain cool."
Sounds like DYI injury to me.