Dean will deal with Sam later. Right now all of his attention is on Cas. Cas, who is miraculously not dying anymore.

"Dammit, Cas." That's all he can manage to get out and his voice still cracks at the end. He was actually terrified there. Still kind of is. He scrubs a hand over his face roughly, completely ignoring the way his cheeks feel sticky. "Don't you ever do that to me again."