Formation

Sitting in my living room, sipping a cup of tea, I heard the most unusual noise.
It was either a security airship passing, or three dozen lawnmowers flying overhead.
An airship was the likely source of the noise, since the most lawnmowers I’ve seen flying in formation was seven.
And it wasn’t so much as a flying formation of them, but a delivery truck striking a lamp post and its contents being strewn throughout the roadway.
So, it’s probably an airship.
Or the man next door, who makes odd noises like that.
His imitation of a cow is impressive, though.