MOUNT VERNON, Wash. (AP) -- Police in Mount Vernon, Washington, killed an agitated Angus cow that rampaged through town, tossing a police officer into the air and tap-dancing on a patrol car. The Skagit Valley Herald reports (http://is.gd/dm29HB) that police spokeswoman Shannon Haigh says the cow apparently escaped from a farm outside the city limits. It was first reported in a Wal-Mart parking lot last Friday.