Two nights running, Chinooks, the twin blade helicopters they use to transport tanks and troops in. So low that I sat up in bed the first night thinking that it was surely coming down on top of the house. Looked out of the window to see it disappearing and just clearing the top of some trees in the field over the road. I was very shaken and it woke the baby and DD too.
Now, I know they have to do night traning exercises, and the local Squadron has been to/is going to Afghanistan, and it's probably in the interests of UK security, but still....It scared the living wits out of me.