In the Mexican hotel room, Rack gives the shotgun to Lonnie. Lonnie lays it on the bed with the barrel pointing to the pillow. When Lonnie is working with the pillow case, it flips directions twice.
The movie takes place in Greer County, Oklahoma. Rack, Lonnie, and Skunk work at the Jackson County Sheriff, which is in Jackson County, Oklahoma. Jackson County is south of Greer County.
When Jeff and Rack are looking for a radiator, they pass a pile of cars when heading toward the junkyard. When Rack, Lonnie, Skunk, and Tito leave, they pass the same pile of cars.