L.C.
You're putting a sleeping (not unconscious) person into a room alone... when she scans her environment for safety, she finds she is alone and wakes up in terror.
All she has is her instincts. She doesn't know about doors and glassed-in windows. She only knows that alone = eaten by a bear. She doesn't know about the absence of bears --only her instinct that when she is alone, she's in terrible danger.
You can get her to stop calling out to you, but you can't convince her she's safe.