When the lightning leaders attach, the lightning zaps down in something called a discharge, and the discharge is called a return stroke.
The electrons all come zapping down from the cloud, and it has about 30,000 amps!
The current in amps that comes from a regular plug in the wall is about 20 amps, so a lightning strike is like 1,500 plugs!
(from: wikipedia - lightning)
Kid Facts - Blast from the past: Copper