The key to winning, as always, was looking as if you had every right, nay, duty to be where you were. It helped if you could also suggest in every line of your body that no one else had any rights to be doing anything, anywhere, whatsoever.
Terry PratchettContrary to popular belief and hope, people don't usually come running when they hear a scream. That's not how humans work. Humans look at other humans and say, 'Did you hear a scream?' because the first scream might have been you screaming inside your head, or a horse backfiring.
Terry Pratchett