ExplosionC.mov (1.35 Megs) Link to Explosion Tutorial
Wired Explosion Tutorial

This effect was created in 2008-9 for a tutorial posted on Wired.com and GameDev.net. The idea was to show people how particle explosions are created, and also to help promote the Vicious Cycle Software's engine. The effect was cheap, and variations could run on any platform with low overhead and very little memory used.