I was on my way to downtown Asheville to see the 4th of July fireworks a couple of years ago, and I was debating whether to take my camera or not. I felt we have all seen enough fireworks and at that moment I couldn't think of anything new to do. But I took  my camera anyway. While watching the fireworks display, I started to play with the shutter speed and the F- stops in combination and these are some of the images I got. 

See more images like these here and here.