The following advice can save your life, especially if you are an impulsive black not brought up to respect legitimate authority. And yes, the authority of the police is legitimate even if the particular cop you encounter is an arrogant asshole as some of them are.
Pull over when it is safe to do so. Roll down the driver's side window. Do not exit the vehicle! (That's cop talk for 'don't get out of the car.') Put both hands on the top of the steering wheel. This shows the cop that you do not have a weapon, at least not in your hands, and it demonstrates submission to his authority. Have the scruffy guy riding shotgun put his hands on the dashboard. When the cop arrives at the window, greet him, "Good morning, officer!" Be aware that cops deal with the scum of the earth on a daily basis and they are nervous. They just want to get home to their families alive at the end of the shift. Put him at ease.
"May I see your driver's license?" "Certainly, it is in my cargo pants pocket." Point to the pocket. Then SLOWLY pull out your wallet and hand him the license.
"May I see your registration and insurance papers?" "Absolutely, they are in the glove box." Now open the glove box and pause for a second or two to allow the cop a look into it. Then SLOWLY take out your papers and hand them to the officer.
If you follow these steps, then, instead of getting roughed up or shot, the cop may likely say, "You were doing 70 in a 55 zone, but I'll let you off with a warning." Or maybe he writes you up. If the latter, then you accept the citation and you pay it. The law is reasonable; you violated it; you accept the penalty. Don't try to bribe the cop or tell a story about whatever. Be a man or a woman, not a scofflaw leftist punk. Take responsibility for your actions.