Out of curiousity, if you were to use heartstop while possesing someone, what would happen?

If the person you are possessing dies, so do you. I believe heartstop is one of the unforceable commands though.

Oh, ok...
So we don't want the person we're possesing to die while we're still possesing them?

What happens if you cubix them to Astral, or force astroglide. You still snap back like normal, right? (Although there's no point if they have a cubix, really). And you probably want to actually kill them if they're bad enough enough to be possessed. But it would be fun to fling someone to Astral and walk back to your nexus to gloat.

That is EVIL. And awesome. It would also avoid suspect...

Especially if they're a Wiccan Astrologer without Nexus. They couldn't get down without someone to rescue them.

Shiri, you need to start being very afraid of my pooka; I want to do that to someone. (Although you probably have Nexus.)

Well, if they're in a state in which you were able to posses them and force them up there, whether they have nexus or not probably won't make a difference...