Depersonalization & Derealization?
A change in an individuals self-awareness such that they feel detached from their own experience, with the self, the body and mind seeming alien.
Terms commonly used to describe depersonalization: unreal, disembodied, divorced from oneself, apart from everything, unattached, alone, strange, weird, foreign, unfamiliar, dead, puppet-like, robot-like, acting a part, 'like a lifeless, two dimensional, 'cardboard' figure', made of cotton-wool, having mechanical actions, remote, automated, a spectator, witnessing ones own actions as if in a film or on a TV programme, not doing ones own thinking, observing the flow of ideas in the mind as independent.
A change in an individual's experience of the environment, where the world around him/her feels unreal and unfamiliar.
Terms commonly used to describe derealization: spaciness, like looking through a grey veil, a sensory fog, spaced-out, being trapped in a glass bell jar, in a goldfish bowl, behind glass, in a Disney-world dream state, withdrawn, feeling cut-off or distant from the immediate surroundings, like being a spectator at some strange and meaningless game, objects appear diminished in size, flat, dream-like, cartoon-like, artificial; objects appear to be unsolid, to breathe, or to shimmer; 'as if my head were inside a Coke bottle and I'm viewing the world through the thick glass at the bottom'.