I've got another story idea I've been playing with, but never got around to using. If anyone is interested, you're free to use it as I'm unlikely to. It concerns a guy who suddenly sees little 'critters' pestering people. Upset at their fury, he attacks them, launching a protracted battle, not just with them, but with the entire established medical community.
Update: I went ahead and developed the story, already published as The Demons Within. It'll soon appear on SOL, just as soon as I finished getting the sequel, Speaking With Your Demons, edited.