This time, it came in through the wall, emerging like a spirit from an oil painting of a revelry of the Greek gods. It was about the size of a basketball and shone with a hazy red glow. It drifted gracefully over our heads, leaving behind a tail that gave off a dark red light. Its flight path was erratic, and its tail described a confusingly complicated figure above us. As it floated, it whistled a deep tone pierced with a sharp high whine, calling to mind a spirit blowing a flute in some ancient wasteland.