kleist could not help but stare at the bureaucrat 's throat , as the man gulped nervously and explained why it was impossible , how they could not ask the nkvd for such a list , how they did not , could not , cooperate with the soviet intelligence service , who after all were working against them , suspicious of them , no matter what the stated policies were ... . kleist watched the bobbing of the man 's hyoid bone , the thyroid cartilage of his larynx , the ligaments and tendons and soft fascia .