“Go away or fight” reaction is very intense and mobilize many body systems. Circulation, the concentration of oxygen and carbon dioxide in the blood is changed, and the muscles are tense and ready for action.
All these changes have a profound effect on body sensations and weakness of the extremities (arms, hands, legs, feet) is one of those sensations. Tingling sensation caused by the accumulation of carbon dioxide from the blood to the extremities. If you shake the limbs, it can improve circulation in those areas. These symptoms are not dangerous and eventually will disappear. Light exercise can also help reduce these symptoms. These symptoms do not mean that you are experiencing a heart attack or ANY neurological problem.