"At the risk of sounding existential, it had to do with a lot of doors. When I was four, I ended up walking through the wrong door, and wandering into the Bar at the End of the Universe- another alternate... parallel... whatever. Place like this. Actually knew a version of you there, too. Hung around there a couple times, age six, thirteen, I think for a week at sixteen... then, right on cue, nineteenth birthday rolled around, I headed to Canada to get shitfaced, wandered into a bar, and the door landed me on my ass in this version of NYC. I wish I could say I was shocked, but I was more pissed, than anything."
He took a toke after that, letting the silence reign so Greg could take that in.