Amstrong, I have sent you a PM
Dave, I see, like me, you are a pedant!
Presumably the chandelier was fastened with a threaded bolt that passed from the ceiling beneath, to emerge through the floor above in a recess, where there was a washer above which was a nut screwed on to hold the bolt in place. When the nut was unscrewed the bolt disappeared down through the structure of the floor causing the chandelier (under the influence of gravity) to fall and scatter its components around the bedroom below.
The nut and washer were then carefully replaced exactly over the now vacant hole so that the carpet looked undisturbed in the hope (probably hopeless) that the hotel staff would assume it had unscrewed itself.
Is that description exact enough?!