Lightning and Tornadoes Screensaver - Version 1.0 Shows a images of extreme weather. Witness the destructive force of massive tornadoes. See time-lapse images of powerful lightning strokes. View incredible cloud formations that accompany fierce storms. Appreciate the power of Mother Nature without leaving your computer. Includes 28 images. The sounds of thunder and falling rain are also included. This evaluation version shows all of the images available in the full, registered version.