Initially the stranger acted very cautiously to guard the fact of his invisible. Why did he then laugh loudly and advertise his invisible presence while throwing the halls out of his room? 

Or

What inference do you draw about the stranger’s increasing casual attitude towards safeguarding his invisibility? Discuss with reference to the furniture hurling episode when the halls examine his room presuming him to be absent.

The stranger was very particular about hiding the fact of his invisibility because he required a proper boarding and lodging for himself. Had he made it known right in the beginning, Mrs. Hall would have never taken in such a weird guest in her inn. Hence, he carefully camouflaged his appearance by using an artificial nose, swathing his head, supporting extra-ordinarily huge spectacles, putting on his gloves and covering himself from head to foot with cloths. His disguise was intelligently devised to give his invisible self a nearnormal shape. Thus he successfully avoided the arousal of suspicion about his peculiarity. However, after securing a place to live in, the stranger was no longer strict about safeguarding his secret. Little episode indicated his hollowness and gradually his secret began to give way. On the very next day of his arrival, when he was bit by fireside’s dog, the cart driver got a glimpse of nothingness through the tear of his trouser and glove. Mrs. Hall, who took him by surprise many times, had a chance to see a huge cavity below his nose. On another occasion, she caught him without his spectacles and happened to see his unusually dark and hollow eye-sockets. On whit Monday, the halls heard the invisible man sneezing on the staircase but did not see him. But the truth was that the invisible man could see clearly that he had aroused enough suspicion. Hence, he was amused by their panic and burst out laughing without bothering to conceal the fact of his invisibility. He was well aware that the beans already been spilt and the secret of his invisibility was soon going to be known to all. Therefore, he wasn’t as cautious as earlier and sought pleasure in the confusion that his invisible status was creating.