Amazing Light Show

I didn't see any fireworks today, but as I was driving home tonight from celebrating Independence Day with family, I did see an amazing light show.  It was all electric blue.  What made it special was it was that the lightning was behind some clouds, so I saw the silhouettes of the clouds.  It was in the distance when I first saw it, but it lit up the entire sky when I got home.  Surprisingly, it didn't rain where I live, though the radar showed downpours a couple miles in either direction.  I'm not complaining, I was very happy with the couple inches we got last night.