A group of kids play soccer in front of an empty soccer stadium. Suddenly it starts to rain. The kids seek shelter, and do not see what happens: As the rain hits all the different the stadium lights, the PA system, and so on, it all comes to life, as if by magic. Finally, the kids turn around, to see that the entire soccer field has been lit up by the huge stadium lights. They run happily onto the field to play.

HOW CAN WATER BECOME ELECTRICITY?