I have always known this. My mother instructed me a long time ago. There is really no safe position for a black man who is confronted by a policeman. Even when running away I cannot be safe. My best chance is to stand still, with my hands up. That way the officer can discharge his weapon fewer times, possibly less frustrated trying to hit a moving target.
Hands up, stand still is the best chant. Either that or roll up in a ball and play dead. It makes it easier to put on the handcuffs.