Well I tried to do this "photograph-melting-into-some-scary-black-and-white-picture" like you sometimes see in movies... What do you propose I do instead? If you have something scarier in mind, I might give it a try; I mean it's still a perfect .gif to scare the hell out of people in STEAM games that allow signatures Thanks for the comment!
Maybe if you did the flash thing once or twice, then sort of fade into the other picture really slowly? I'm usually a lot more freaked out by slow, subtle transformations than fast ones. If you don't like that, though, it works pretty well as is!