Since guys like Roger from Training day (the ones that have a gun hidden in the newspaper they're reading) are rare instead of common, I'd watch the noisy one
trying to be scary before I'd watch the quiet ones
reading a book, newspaper, or magazine, since the noisy one
is the one that will creep up from behind and shoot, split the back
of your skull with a hammer, cut you in half with a machete, or run you over and keep going, all while claiming it was in self defense or on accident.