Damage_05.bmp is the electro ball one, right?
It is not used in stock, but you are free to add more animations any time.
I was originally thinking of using that one for my lasers, but I made myself a better one:
http://imagemodserver.mine.nu/other/...ectroflare.png
(Upper ship firing at the lower one)
You can get the source files from GGmod
http://www.shrapnelcommunity.com/thr...?Number=471968