If you have ever locked yourself out of your car and called the police or AAA to help you get back in, you know that the tool used is a thin metal strip with a flat hook on it. From this article you can now see how this strip works.
A simple vertical motion from either the knob on the door or the power-lock actuator is all that's needed to turn the lock and open the door. What the officer is doing with the metal strip is fishing around until he or she hooks onto the point that the knob and actuator connect to. A quick pull on this point and the door is unlocked!
For more information on power door locks and related topics, see the links on the next page.