A lot hinges on the fact that, in most circumstances, people are not allowed to hit you with a mallet. They put up all kinds of visible and invisible signs that say, 'Do not do this' in the hope that it'll work, but if it doesn't, then they shrug, because there is, really, no real mallet at all.
Terry PratchettA Duke couldn't have the arse hanging out of his trousers when meeting foreign diplomats. Actually even plain old Sam Vimes never had the arse hanging out of his trousers, either, but no one would have actually started a war if he had.
Terry Pratchett