I took this in pittsburgh, US. Apparently they have fireworks every month or so. And I happened to be there on one of those days. It's a celebration of their baseball games, aren't they rich or what? It lasted a long time... comparable to our National Day fireworks, very impressive for having that almost monthly.
I am new to digital photography so when that event suddenly happened, I was not prepared for it... so I just took many photos with various settings. A lot of them looked horrible but I will put up the decent ones after I found the time to put them together.
Thanks for all the comments.