Amazing massive mounatin lightning thunderstorm. This is a layered image equal to about a ten minute exposure. Sepia Print. Fact: During a thunderstorm, each flash of cloud-to-ground lightning is a potential killer. The determining factor on whether a particular flash could be deadly depends on whether a person is in the path of the lightning discharge. In addition to the visible flash that travels through the air, the current associated with the lightning discharge travels along the ground. Although some victims are struck directly by the main lightning stroke, many victims are struck as the current moves in and along the ground. Buy Prints, Posters and Greeting Cards available all sizes. Guaranteed to liven any decor. Great for your home, office or makes a GREAT gift.