http://www.wikihow.com/Avoid-Getting-Shot-by-a-Police-Officer
How to Avoid Getting Shot by a Police Officer
Whether or not you have done something wrong, there is no reason to be shot by a police officer -- that is, unless you give them one. Here are some ways to avoid personal harm in situations with a police officer that has their gun drawn.
Steps
Stop. Do not move unless directed by the officer. At this point, any movement you make that is unexpected is one step closer to getting shot.
Keep your hands in clear view. If the police officer cannot see your hands, he or she will assume you are going for a weapon. This can lead to you getting shot.
Follow all directions. The officer will tell you exactly what he or she wants you to do. That typically includes putting your hands on the back of your head, walking backwards toward the sound of their voice, or lying down on the ground. Do it. At this point you've either already broken the law and don't need to make it worse on yourself, or you are the victim of a misunderstanding and need to cooperate to help prove your innocence.
Do not talk. Chances are good that there is not much you can say to help the situation. If the officer has drawn their weapon, you will almost certainly be arrested, and there is not much you can say to stop that from happening. If they've drawn their weapon, they're certain it's needed. There will be plenty of time to talk once you are in cuffs and no longer considered a threat. You may wish to consider answering questions posed by the police officer. However, you have the right to refuse to do so. It is almost always in your best interest to remain silent. Police officers are not allowed to continue questioning you if you request an attorney. (US only)
Go slowly. Sudden movements make officers nervous, and nervous officers are more likely to whip out their guns.
Don't brandish a weapon. If you have got a gun or knife in your pocket or waistband, leave it alone. Don't draw it, even to surrender it. The officer would much rather find it on his or her own than have you whip it out and wave it around. If you would prefer to surrender the weapon, clearly speak words to the effect of "I would like to turn over my weapon." before drawing it.
Let yourself be handcuffed. Yes, it may be uncomfortable, but retaliation or struggling is only going to result in serious injury. In many cities, it is police protocol to place handcuffs on even the most cooperative of suspects.