The wonderful world of Chaofanatic

[Ultimecia]

Both in movie, comic and game industry they use this denomination. The most famous example is at the Lion King, one scene that Simba lies down and a "dust" forms. Many "hidden message" sites mistakenly points it spelling "SEX", but in fact it forms the letters "SFX", from "Special Effects".

Also this is a sprite site, with sprites of the effects on the icon and there's no sound effects on the entire site ;p