When they crash together, they create —the same kind of electricity that makes your hair stand up if you rub a balloon on your head or gives you a little "zap" when you touch a doorknob after walking on carpet. The positive charges move to the top of the cloud, and the negative charges move to the bottom. The Flash: Lightning
It all starts inside a big, fluffy thunderstorm cloud called a . Inside these clouds, the air is moving very fast. Bits of ice and raindrops are bumping into each other like bumper cars.
If you count the seconds between the flash and the bang, you can tell how far away the storm is! Every five seconds you count equals about one mile of distance.
