This is a simple defense system. The laser bounces of the main mirror,
disperses through the lens and hits the moving mirror. Of course you
understand that in Q2 it is impossible to do that with lasers so the where
one laser terminates another has its origin. The effect is two triangle like
targets on a wall which stop anything coming through a hallway, tunnet or
wherever you might think of putting it. I suggest it for TF mostly because
of its defensive qualities. Also there is a trip in defeating this system,
check out the file and you'll see it.
