Unfortunately, according to a news report I heard yesterday, it was not the first time even this week, that a block had fallen from a helicopter. Maybe one block falling is bad luck, but a few questions need to be asked all the same. It was bad luck that the second one landed on a cable car in an area as sparsely populated as the Alps. However, at some stage of a helicopter's flight, it is always going to approach a place where there are people.