Dean looked up at the sky. The angels were falling. "Cas- Castiel!" Dean shouted, hand on Sam's shoulder. Cas didn't come. "I need you, Cas! Where the hell are you?!" Dean picked up Sam and slid him in to the passenger side of the impala, somehow managing to get the door open. Dean slid the keys in to the ignition, hands shaking as he turned the key. His baby started up and he reversed, heading towards the bunker.
"Sam. Sammy, talk to me. Don't go to sleep on me, you hear?!" A barely audible groan was all that came from the younger Winchesters mouth. "Damnit, Cas!" Dean sped towards the bunker, talking to Sam, trying to keep him awake.
Castiel looked up at the sky, tears streaming down his face as his brethren fell. He fell to his knees, feeling utterly defeated. He had failed to save Heaven. He dropped his head in his hands and wept for the loss of his grace and for his fallen siblings. How would they cope with their sudden humanity? Probably about as well as I'm going to, Castiel thought, fingers touching his throat where Metatron had stolen his grace. Are Dean and Sam okay? He thought. Castiel didn't even know where he was. How would he find the two Winchesters? Castiel's hand went to a pocket in his beige trench coat, feeling an oblong shape there.
He pulled a cell phone out of his pocket, flipped it open, found Dean's name and hit the call button. He waited as it rang.
Dean's cell phone started ringing. Dean angrily snatched it up, looked at the caller ID and opened it. "Where the hell are you, Cas?" Dean barked. "Why didn't you come when I called?! Sammy's here, dying."
"He made them all fall," Castiel's voice was broken and small. "He took my grace, Dean."
"You mean," Dean paused as the realization struck him. "You're human? Damnit. Where are you?"
"I'm not sure. Go take care of Sam, I'll find my way there."
"Alright." Dean snapped the phone closed, tossing it carelessly beside him. "Sammy, don't go to sleep on me." Sam groaned softly, clutching his chest. Dean cast a worried glance at his baby brother.