Find out who comes in first when it comes to speed. When the Flash runs at supersonic speeds, his friction causes a trail of lightning and creates a sonic boom every time he takes off, making the ...

It's like a fiery dagger slicing through the sky, leaving behind a trail ... see the flash before we hear the thunder, as light travels faster than sound. The sheer speed of lightning is a ...

This is the archetypal lightning bolt, one that arcs out of the sky and smites the ground with a great, often flickering flash of light. Lightning is the sudden release of built-up charge stored ...