Did the earth move?

OK, so we knew the house was near to the airport. And after all those years at Elsenham, I though I knew the score. But this is something different. They are so loud! Although only the occasional one – maybe one or two an hour. But some of them sound like they’re literally going to land on the roof. I have to fight off the urge to duck (as if that would help anyway). At least the airport doesn’t operate through the night.