Well, most theories I had (were/are currently being) discussed. This is one I'm just going to sit back and watch the fireworks go off, instead of trying to evaluate whether it's a cake or a mortar from the sound of the squib. (yay metaphor, and yes I know too much about fireworks)

I'm just going to comment about one thing. HUGE props to Kc Wayland / Ron Ghallager / Katie Wayland on the music for this episode. It's a subtle thing, but adds so much to this episode. Big kudos.