Her terror was compounded by the feeling that she was being watched.
The political repression in this country is enforced by terror.
She felt panic and terror rise in her whenever she thought of the future.
Night terrors (different from nightmares) and somnambulism attacks also occur during slow wave sleep, all these data showing non-visual mental activity during sleep.
I was fighting my own terrors in public, but others wanted to do it more gently.
In fact, it is possible to induce terrors by external stimulation, such as sounding a buzzer.