The stunt where the wall falls on Buster Keaton was performed with a real full-weight wall. Half the crew walked off the set rather than participate in a stunt that would have killed Keaton if he had been slightly off position. Keaton himself, told the previous day that his studio was being shut down, was so devastated that he didn't care if the wall crushed him or not.
This and The General (1926) are generally considered by critics to be Buster Keaton's last great films. Shortly after these two were made, the independent-minded Keaton made the mistake of signing a contract with MGM, whose regimented ways clashed with his scrupulous perfectionism. Five years after MGM hired him, it dropped his contract and Keaton drifted into obscurity, complicated by a severe drinking problem, from which he didn't emerge for many years.
The hat that Bill, Jr. quickly removes from his head and hands back to the clerk with a frown is Buster Keaton's own trademark porkpie hat.
The famous collapsing wall gag was previously used by Buster Keaton in Back Stage (1919) and One Week (1920) with smaller buildings. This was to be the ultimate version of the stunt. The comedian remarked later in his career, "I was mad at the time, or I would never have done the thing."
During the hurricane sequence, there is a scene that pays homage to Buster Keaton's childhood on the vaudeville stage. One brief moment has a table move in the wind, apparently animating the dummy and turning its head to face Keaton, who is startled and runs. This is based on a real experience from when he was a kid and became fascinated with a dummy named Red Top, who belonged to ventriloquist Trovollo. The young Keaton had a "conversation" with the dummy and conspired to kidnap his new friend one night when the theater was empty. Trovollo, anticipating Keaton, slipped to his props offstage and when Keaton approached, brought Red Top to life, scaring Keaton out of the theater.