There's a noise from outside, like a plane or helicopter going over, but loud, and like... WWAAAAAHOOOOOOWAAAOOOOOOOOWAOOOO. It's like nothing I've ever heard before.
@ZenHeathen@Guillotine_Jones That's the migratory WWAAAAAHOOOOOOWAAAOOOOOOOOWAOOOO advance scout bird, which stops on selected roof tops to make it's travelling noise to tell it's flock which way to go.