Haha, dang, I wish I had meant that on purpose; it just came out on accident.
One of the guys I work with uses two lasers, shining vertically on his drill bits, for drilling beautifully straight peg holes.
Thing of beauty, works amazingly well.
Or placing the laser horizontally down the middle of a knife blade cut and therefore having the laser shine right along the chainsaw bar; perfectly level every time.
Now if only they could get the darn things to actually cut...
Cheers, chuck