Pretend It's a City Puns

So my grandfather is on his honeymoon with our grandmother and they are driving to Las Vegas, on their way there they see a fellow on the side of the road. They debate about taking him to the city instead of leaving him there, the end up letting him get a ride to the city, they say "Hey sir, want a ride to the city?" He replies "sure thanks", they drive down the road and notice he has a bag, so they ask " what's in the bag?" He replies with "None of your damn business" they start to think in their heads, what if he has something illegal or dangerous, so my grandfather takes action, he goes to the side of the road and pretends to fake piss and opens the door and my grandmother kicks him out and my grandfather gets back in locks the door and they speed off, as they're driving they notice he left his back and dropped it in the car, they decide to open and see what it beholds, they open the bag and find a single piece of paper, the paper had wording on it, it said "None of your damn business."