Working in a labor dispute, for the United Farmworkers Union in NYC, at huge produce market in the Bronx where we hoped to follow trucks carrying lettuce from a certain big farming operation in California. Strikers had come east to work on a boycott of the lettuce, and we convinced stores to simply buy a different brand, fairly easy to do in union-strong NY. As we left the compound past the security gate, going about 10 mph, a car pulls up on my left with four tough looking guys in it. Guy riding shotgun says "stop the car." I wasn't about to stop, as some of our people had been beaten up few days earlier. The 3 non-driver occupants pulled guns and the guy said, "I said stop the car, godammit!" I stopped as they came out of the car with guns drawn. I started to race the engine slowly, intending to jam in reverse towards the protection of the uniformed cops/security at the gate behind us. Guy with me, Oscar, said "No, Nico, esperate." (Wait). I did, and yelled at the approaching guys, who are you? "Police Officers." "Let's see some badges." One of them flipped out a badge from his pocket flap, and the tension ended. (Don't know if you ever saw the Treasure of the Sierra Madre, but the cop could have attained immortality had he said, "I don't got to show you no stinking badges," as the Mexican bandits said to Bogart in that old movie, I believe.)
Turns out their were undercover narcs, hence their shabby appearance, awakened at five am to go to stop the hijacking of the truck. The driver, in a brilliant move, had called the cops and said that "two Puerto Ricans" we're going to hijack his vehicle. As one Italian and one Mexican we fit the bill. Cops were very apologetic (one, a Puerto Rican, joked that he would have been afraid also) suggesting maybe we could still catch the truck. I muttered something about having to change my underwear, and we laughed. I asked why they didn't show their badges, and one said that last time he did that, someone almost shot it out of his hand. In reality, they could have said in typical NY style, "Police officers, asshole, stop the car," and I would have complied.
Just one of several great stories about interaction with NY-NJ cops at the time. They generally were crazy and wonderful at the same time.