[No time to answer, shorter Winchester! You're kind of in serious danger. This angel will be zapping in next to Dean to drive him to the side--away from the fireball's path. And, in the process, that... singed the back of his trench coat. Damn, the sacrifices he keeps on making for these guys.]
Stay with Sam. [And now Dean is being sent home too. Oh man, Cas was going to be confronted by two angry Winchesters when he got back. As for now, he's turning around to face Zelman.]