When Watty and Starlene dash out of a used TV store, they run past a white wall, painted with the words, "Free Tex Watson." This is an homage to John Waters. This slogan appears spray-painted on a wall behind 'Divine' as he prances through Baltimore's ghetto streets in Waters' Pink Flamingos (1972).
The trio crosses into Mexico (heading for Acuna) at a land crossing (one guard, small guard shack with a drop arm barrier across the road). All crossings between Del Rio, Texas and Acuna, Mexico have to cross the Rio Grande River at a bridge. In addition, all U.S.-Mexico border crossings have both U.S. and Mexican border patrol guards.
When Watty is driving with Starlene next to him, as they begin their trip to Mexico, in the shots from one angle, he is wearing his multicolor leather jacket, but from the other angle, he is not wearing the jacket.
Ranger X: Yeah, me and Simp were just cruising the neighborhood, and knowing your feeling towards robbing and stealing, well, we just stopped on in to have us a little chat.
Watty Watts: [Narrating]
Up until now, I always considered myself happy. I had a beautiful girlfriend... a car and a trailer home. But at this moment I knew my life had taken an unwelcome turn. I'd been a con and a thief for twenty-five years, but I never hurt no one. Billy had violated the code: he'd packed a loaded gun. Speed-snortin' psychopath sittin' next to me, had interrupted the flow of my happiness. He had killed someone in my presence... and in all likelihood, my life had been fucked.