Apparently the southern states are being invaded by an ant whose seemingly purposeless motions and movements have given it the name of 'crazy ant.' These ants hale from Argentina and Brazil and have been slowly spreading into the south, displacing the rather fierce fire ants that have been here for quite some time . . . if you've never met a fire ant, its something to behold, these SOBs can be very aggressive and have a bite almost worth writing home about.
The ants are spreading slowly but, unlike the fire ant, they have no respect for boundaries and invade every nook and crevice of your home, even chewing up electrical cords when the opportunity presents itself (that sentence makes no sense to me, as when does chewing on an electrical present itself as an opportunity).
But apparently these guys just jerk and twitch as they move about.