Use Laser from DVD Burner to build hand-held Laser Device
 

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. (src: Slashdot)

http://lifehacker.com/software/diy/t...ser-287252.php

This is very very dangerous! Never look directly in it and look very good where you aim it at!
But it's cool :D

Some one is going to get hurt bad after this. I surely hope it is not the case.