Superego

>Uh, Grey? What exactly are you feeling? The switch or the machine itself?

Until something like, say, the individual subjects' rooms combining all into one happens, you have to assure yourself you still have a shot.

On top of totally jinxing things this is exactly the kind of line of thought in a dream that will inevitably lead to that exact thing within a dream happening.

I can't tell you the number of times when in a dream I thought "Well I sure hope [undesirable thing] doesn't happen" only for that exact thing to happen immediately after. Sometimes even simultaneous with the thought itself.

I mean sure this is a shared dreamspace supposed to be kept stable by a machine, but if even one mind is considering the possibility of the individual subject rooms merging I think it's reasonable to assume things will soon be trending that way (assuming they aren't already).