electric shock 
noun
A sudden discharge of electricity through a part of the body: the lead singer got an electric shock from his mic...
- The pain can be steady and burning or come like sudden electric shocks.
- A defibrillator emits a series of electric shocks, these make sure the heart does not have erratic rhythms.
- If the instrument and the expertise are available, electric shocks are administered with a defibrillator, which may or may not restore a normal electrical rhythm and hence a regular beat.