Rodeo Dough

The film Mary references with Claudette Colbert is It Happened One Night (1934).

The gas station attendant asks the driver pulling Kokomo's trailer if he can sneak a peek at the steer. The driver dissuades him by saying that if the door were opened, "Kokomo would kick the sides out of this here trailer", and the attendant leaves to get change. The girls then are shown sneaking into the trailer's side door, which is on the driver's side of the trailer. A scene cut shows the attendant returning along the driver's side of the trailer. and he gives the driver his change. The camera view then switches back to the girls completing their entry and closing the door. Therefore, the station attendant had to have walked past the girls getting into the trailer and should have alerted them to the dangerous steer, or he at least should have told the driver about the hitchhikers.