Person suffering from extreme fear or anxiety, usually as part of their anxiety, personality, or psychotic disorders.
They do not move, not because they can't or because they are
lazy, but because of fear, embarrassment, bad
feelings.
Most of social anxiety sufferers resume normal moving, when they are
alone. They only freeze when near people.
Besides not moving, they have other symptoms such as headache, toothache, jaw pain, because these organs freeze too.
When guests arrived at my
house, my body started to shake,
sweat, and I could not
move for few hours.
When they left, I resumed my normal activities. Hell of a day! I think I am a catatonic.