The whole body then becomes stiff. The hands are clenched, with thumbs inside the palms, the legs are extended, the arms stiffly bent, and the head thrown back, or twisted to one side. The muscles of the chest and heart are impeded in their action, breathing ceases, the heart is slowed, and the face becomes pale, and then a livid, dusky blue.
The skin is cold and clammy, the eyebrows knit; the tongue may be protruded, and bitten between the teeth. The eyeballs seem starting from their sockets, the eyes are fixed or turned up, so that only the sclerotic ("whites") can be seen, and they may be touched or pressed without causing blinking. The stomach, bladder, and bowels may involuntarily be emptied.
This tonic stage only lasts a few seconds, and is followed by convulsions. The head turns from side to side, the jaws snap, the eyes roll, saliva and blood mingle as foam on the lips, the face is contorted in frightful grimaces, the arms and legs are twisted and jerked about, the breathing is deep and irregular, the whole body writhes violently, and is bathed in sweat.
The spasms become gradually less severe, and finally cease. Deep breathing continues for some seconds; then the victim becomes semi-conscious, looks around bewildered, and sinks into coma or deep sleep.
"...As one that falls,
He knows not how, by force demoniac dragg'd
To earth, and through obstruction fettering up
In chains invisible the powers of Man;
Who, risen from his trance, gazeth around