Knocking on wood in some places it's called "touching wood," but knocking on wood for luck is an almost universal compulsion.

This creative walkway is made out natural wood and lightweight steel, providing for the future growth of plants and placed so it is barely touching the preserved canopy.

If the baby is still touching the cable after electrocuting himself you should switch off the current or alternatively use a piece of wood like a broom handle to move the cable away from the baby.