I’m just curious, what is your ethnical background? I have seen a lot of other people trying to get in with the LAPD and I have seen nothing but horror stories. I am amazed you were so flippant and so successful.
Also, read the book and you'll be fine, just remember to practice. If you go in knowing you will pass, you will. Read as many post in the section about sharing experiences (the third one) as you can and you will see just exactly what to expect, then as you are testing you will be able to determine the polygrapher's next words. It's almost comical.