Not that you need an extra reminder that "lightning + golf =" is a dangerous equation.
But just in case...
The above photo comes from Wichita Falls, Texas, which experienced severe storms on Tuesday morning.
When lightning strikes the ground, it will branch out along the soil, or in this matter, a green. Currents stem from the center strike in a coiled weave, which is why it's dangerous to lay flat on the ground during a storm.