These days I am working on a project involving an interactive firework animation.
The purpose is to have at the end something like this:
http://maylin.net/Fireworks.html,
but with additional features.
I found the following helpful tutorials for this task:
Firework
http://www.wipeout44.com/tutorials/flash_fireworks.asp
smoke effect
http://www.pixelhivedesign.com/tutorials/Realistic+Flash+Smoke+Effect/
flame effect
http://www.sitepoint.com/article/flash-script-fire-effect/
Results in a few days / weeks! (as I may be working parallely in something else…)
