A green blue black resistor would be 56 ohms. Electric shock is a major hazard. The severity of the shock will depend on the level of the current and the length of time it is in contact with the body. At very low levels of current the effect may be only an unpleasant tingling sensation, but this may be enough to cause a man to lose his balance and fall. Higher levels of shock can cause fibrillation of the heart which is almost always fatal.
Electric shock can also cause burning of the skin at the point of contact.
The following table lists the health effects of exposure to electric currents. This is caused by the passage through the heart of current which disturbs the regular electrical impulses within the heart itself. This results in an oscillating condition rather than the normal regular beating. Blood flow is thus impaired and death follows from lack of oxygen to the brain.