Door.
The windows were closed and the front door locked. That makes it even MORE likely for the door to have blown open. All it would take is someone shutting a door somewhere else in the house for the air pressure to blow open that one, as there's nowhere else for it to go.

The ball in the sky: how can you tell it was quite large and some distance away? It was in the SKY. You've got no frame of reference to judge the size. It could have been small and nearby. You have no idea what they could have been? No idea at ALL? Helicopters?! A nutter in a microlite with a catherine's wheel strapped to his arse? A firework strapped to a box kite?
(Musuko, Thu 3 Jul 2008, 18:35, Reply)