[ These are again highly alien-grade questions, but Gray doesn't dwell on that fact, instead glomming on to the very rare feeling of being knowledgeable about something. ]

Usually you'll know, because you won't be able to stop thinking about it. It's a bit like... a noose that slowly tightens around your neck until you realize you're having trouble breathing.

[ Hm. ]

But there might also be times when you feel like you're suffocating but you're not sure why... like there's something wrong in the air.