Columbus: You see? You just can't trust anyone. The first girl I let into my life and she tries to eat me.
When Columbus brushes Wichita's hair behind her ear and kisses her, he leaves his hand behind her ear. Her hair changes position between shots; in some it is all behind her ear, in some it is over Columbus' hand, and in others it is half and half.
The guy at the gas station is also the guy that gets eaten by a zombie whilst on the toliet at the start of the film.