Hollow

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A system's body is hollow when nobody is fronting and this lack of a front drops the body into a catatonic state, a panic attack or other form of uncontrolled distress.

If headmates are co-conscious with the body, they may or may not experience similar or related distress until one is able to front again.

Related Terms
Systems with an autopilot may not become hollow, or may experience a hollow state that is overseen in a limited capacity by an autopilot, for example to keep up functions like breathing, blinking, or keeping the body upright, but not reactions or active movement.