Flex effect for creating something similar to the glitch & flicker of an old CRT when switching on/off or changing channel- maybe i just remember CRTs to be more broken / dangerous than they actually were, but probably not ;p
When used as showEffect or hideEffect either on a popup or in a viewstack the components will glitch on/off screen either as a ropey old CRT or possibly hi-tech holographic display.
This is just a rough starting point to create GPU accelerated pixel bender transition...