Final answer:
The word 'plunged' implies the narrator's urgent, instinctive movement toward safety, suggesting a reaction to fear or a desire to escape a threatening situation.
Step-by-step explanation:
The use of the word 'plunged' in this context indicates a sense of urgency and perhaps fear or desperation on the part of the narrator. The action seems sudden and forceful, suggesting that the narrator wants to quickly distance themselves from a potentially dangerous or uncomfortable situation. It conveys the narrator's instinctive reaction to seek safety and protection by moving rapidly towards the tavern doorway.