What Happens To Human Body During Electric Shock?

When a human is shocked, the electricity is attempting to use his body to reach the ground. The reaction to these shocks can range from minor to very serious.

Muscle Contractions
When a person is first shocked by a surge of electricity, his muscles will contract temporarily until the connection with the source is broken. In the case of a serious, prolonged shock, the person may lose the ability to perform voluntarily actions. 

Burns
One of the most common reactions of the body to an electric shock is a burn on the point of contact, such as the hand, foot or lips. The area will be become charred or red in color.

Heart Attack
The surge of energy through the body during an electrical shock can alter the person's heart beat and possibly cause cardiac arrest.

Pain
An electrical shock can cause severe chest or abdominal pains in a person. There could be internal injuries that he is not aware of, which is why a doctor visit is important after a serious shock (500 volts or more).

Warning
Though electric tasers are commonly used by law-enforcement agents to simply subdue suspects, there have been cases of death. In one case, a man died after being tased because he had cocaine in his system. The reaction of his body to the cocaine caused an extreme reaction to the shock.

Source: http://www.ehow.com/facts_5597594_human-reaction-electrical-shocks.html