"Oh, good. Not far off, then." That'd make this easier. "Well, that little Old Testament-style temper tantrum of his? Was him throwing open the gates of Hell and letting out everything down there. And yes, I do mean everything."
A wry smile at that.
"So, y'know, that's how I got out after... well, basically a decade for us but it's a whole lot longer in hell and even longer in the Cage." Another drink from the bottle. "So when Chuck threw the gates open, Michael and I took off -- why were we gonna stick around? You, Sam, and Cas summoned Michael because you needed his help."
It was a lot to explain, but having to break it down into bits made it seem... well, it was still a lot no matter what but it was a little more manageable now.