Blacksheep - Your answer sounds about right.
Thanks for jogging my memory, I think I had a trap in the dim and distant past. On the VC10 major line of the sadly missed BOAC, I went into work on a Sunday at 6am and because the planned input had gone flying again I was back in bed at 0715 and the missus woke me up at 0730 thinking I'd overslept.
In another place we had a supervisor who was always going on about the coats hoisted up to the ceiling routine and keeping us there to the end when all the work was done. At the end of one shift we all went home and left him looking for his bike which was hanging from the hangar crane in the ceiling. He never thought of looking there.