Perhaps off-topic, but I share concerns over what is being placed in overhead lockers. I am a regular Pax, and I have seen several pieces of luggage fall. Usually without incident but occassionally it has hit pax (curiously it never seems to be the person who placed it) and also CC. This is usually after pax have opened the lockers in flight and not closed them properly or prior to take off & after landing. I have also received bruising from a pax trying to force luggage into a locker which was obviously not just too heavy to lift without a fork-lift truck, but even if she had been successful in lifting it, it was very obviously too large to fit. Her endeavours managed to involve several pax, most of whom received bruising before assistance to place the luggage/small home elsewhere on the plane by CC. Eventually this not inconsiderable loading of the lockers will ultimately contribute to something much worse, although I would rather be proved wrong.