What other extraordinary things happen at the inn?
At the inn, several extraordinary things occur when the Halls enter the scientist's open room. Mrs Hall hears a sniff close to her ear, after which the hat on the bedpost leaps up and dashes into her face. Strangely, the bedroom chair becomes alive, springing into the air and charging straight at her legs foremost.
The extraordinary chair pushes both of them out of the room and appears to slam and lock the door after them. Terrified by this incident, Mrs Hall falls down the stairs in hysterics, convinced that the stranger has caused spirits to haunt her furniture.
Explanation
The question asks for the 'other' extraordinary events at the inn, distinguishing them from the curious robbery episode at the clergyman's study. The textbook context details the bizarre behaviour of the furniture in the scientist's room at the inn. Because Griffin is invisible and undressing, his clothes and bandages are left behind, and he uses the furniture to attack the Halls and force them out, making it appear as if the room is haunted.