In "The Quiche of Death" by M.C. Beaton, the scene captures a tense social atmosphere where a man becomes the focal point of scrutiny from other diners. Their smiles, described as 'polite frozen smiles', suggest a mix of civility and underlying discomfort, reflecting the often stifled nature of English social interactions. The seemingly friendly expressions mask a potential threat, indicating that the diners feel uneasy about his presence.

This moment highlights the contrast between outward appearances and inner feelings, emphasizing how social decorum can sometimes obscure genuine reactions. The use of 'threatening behaviour' implies that the man might evoke fear or suspicion, adding a layer of intrigue to the narrative. This tension plays a crucial role in setting the stage for the unfolding events in the story.