we're plagued with flies

massive bluebottles suddenly appear and buzz crazily around the room bashing into windows and light fittings

tonight I watched one drive himself into a tiny spiders web, the tiny spider was hiding behind a book licking his lips as the fly (which was 10 times bigger than him)  tangled around in the web 

finally the fly buzzed itself free and continued it's noisy flight around the room but this time draped in cobweb like a great big ghost fly