Exactly, Beer. I'm sure there is a legal limit. But people (especially the younger ones) seem to demand ever louder noise, not just at the cinema but also at Festivals. I think they've been clubbing for years and their hearing is impaired. Their reactions are also blunted by over-stimulation from so many sources that they need ever more startling and excessively violent and horrific films to get any response at all from their brains. And cinemas get their revenue chiefly from the young these days. That's my theory anyway.