Character clash: Hamilton and A&P boy

A strong looking man leads his son into the grocery store, holding his hand tight and looking solemnly around. I nod a hello their way, and continue fiddling with my package of gum. The man walks over and starts looking at the candy in front of the cash register. "Is this what you want?" He asks his son, and his son shakes his head no, and says something about ice cream. The man asks me where to find ice cream. "Aisle 6, it's on the sign," I say, chuckling a little. The sign's about a yard away from the man. He smirks at me, but a weird type of smirk. Like a "I'm gonna get you" smirk. He walks over to Aisle 6, grabs some chocolate ice cream. He walks back, throws it at my chest kinda forcefully. I shake my head a little, ring it up. "Look kid. You like this job? I hope not." He says. I chuckle. "It's your lucky day I guess. Nah, I hate this place. I just wanna go watch some Johnny Carson." It's his turn to shake his head, and he says, "Your somethin else, kid. Whatever." His son is lookin at us with bug eyes. I clear my throat. "Thank you for shopping at A&P, sir. Have a nice day." I hand them their bag with the ice cream. The dad nods a little and they walk into the chilly dusk air. The son tugs on his dad's hand. "Dad, who's Johnny Carson?