EDIT: Thanks for all the good comments, I didn't know it was THAT helpful! :P
Hey all NG people. I made this a while ago on the UGOplayer forums to help out my friends with animating explosions.
NOTE: This is simply a smoke explosion. No fire. Don't say "j00 5|_|><><0|2z n00b" because there's no fire. It's meant to be that way.
Anyway, this will work with any version of Flash, and the method works best with a pressure sensitive tablet.
Enjoy, and hope it helps your animations!