Disclaimer: None of these images were produced with the aid of any events-- no events were used in the creation of said photos/videos. Recently I have created a system for more advanced explosions for my good, tasty friend muffinmix.
With it, I've made the protonuke. A very powerful bomb carried on a rocket from the rocket launcher.
Behold:
Boom!

The aftermath:


Streams of debris:

Another one of my creations(again at muffins request) is the projectile swirler. It allows projectiles to swirl around midflight and take much more complex flight paths.
Pong projectiles hovering above town, swirling around

To see these in action, check out this video by DarthVolga
http://www.youtube.com/watch?v=K_w3GzKAgIQ&feature=channel_page