Sam tried Dean's mobile one more time. Voicemail. It had been too long now and Sam was worried. Maybe he should have gone with him?
A noise outside got his attention and he opened the door of the motel room to see the Impala rolling slowly towards the kerb, finally shuddering and stuttering to a stop.
Sam watched, appalled, as the driver door opened and Dean spilled out onto the asphalt, covered in blood.
"Dean!" Sam ran to him, rapidly spotting, and applying pressure, to the bullet wound in Dean's shoulder.
"Th… think I ran out of… gas S..Sammy."