Hey, I want to be able to flick a overlay on a mob, so it flashes the animation over the mob and then removes it. Can I do that without having to like, do a M.overlays +/- thing?

Never mind, I just read up on it.
Well, ignoring the "without having to like, do a M.overlays +/- thing?", you might be able to underlay the mob to itself then flick an overlay so that the mob itself is flicked, but the underlay is not. My game kind of does that accidental-like, since all the icons are built with overlays.