Eons ago when I was in Bomber Command I heard a tale which may or may not have been true about a Valiant with an inert practice bomb.
They were cruising long and there was this loud thump from the back. Eventually the Nav. Radar switched on his bombing control panel to find that the No 5 hook, the one the inert was hung from, had released.
Lots of panic amongst senior officers on the ground who instructed the crew to release it over Wainfleet range by opening the bomb doors and this they did.
There are two endings:
The aircraft flew towards a nominated target and the Nav Radar opened the doors on the calculated release point for a type Zero, i.e. a perfect bomb and it went straight though the target.
The aircraft flew towards a nominated target under control by the bomb function of the autopilot and at five miles to run to the release point the autopilot opened the bomb doors and the inert was never found.