I wasn't sure what you were talking about so I read up on it. I also found a picture. Here is an interesting article about it. http://news.nationalgeographic.com/n...ghtning_2.html
Here is a quote from the article.
Thousands of eyewitnesses have described seeing a floating, glowing ball similar to a tennis ball or even a beach ball.
The sightings generally accompany thunderstorms, but it's unclear what other similarities ball lightning might share with its conventional relative.
Ball lightning floats near the ground, sometimes bounces off the ground or other objects, and does not obey the whims of wind or the laws of gravity.
I have never saw ball lightning. It sounds interest and a little scary.