What is this...and Austin Powers episode??
I have a 5 way laser, it tells up, down, straight line and 90 degrees.
There are plenty of new ones out there, most are OK.
Get the self leveling types, the ones on bubbles are trying to match the accuracy of a transit but miss the mark.
I Love mine because when I do a large home with 20 foot ceilings I can find the center of the ceiling by laying it out on the floor first.
Have fun with it, and keep it away from your eyes.