This video is awesome! I would get one for my tank.
http://www.lazerer.com/
http://www.survivallaser.com/
http://www.youtube.com/watch?v=Cbk7mA5PuAQ&feature=player_embedded
http://www.lazerer.com/
http://www.survivallaser.com/
http://www.youtube.com/watch?v=Cbk7mA5PuAQ&feature=player_embedded