Sam gave his brother a look that said, dude, sometimes you can be so stupid man. "Of course it's partially my fault, but that's not what I meant, man." He shook his head, and ran a large hand over his face, and then ran it through his hair.
He wan't in the mood to punch Dean. All the anger was gone from him. All that was left was fear, dread in a way, and guilt. Guilt the size of Texas.