A few houses ago we had a smoke detector above the landing at the top of the stairs, which overlooked the open space below all the way to the ground. With extra tall levels and 9 foot ceilings that was quite the pucker getting up on a high step on the ladder to fix that crap. Long way looking down.arrow said:
Most has been covered.
Electricians that install smoke detectors in unreachable places.
Modern gas cans that require aftermarket modifications to actually pour gas.