Most people are concerned with shark attacks only when they are in the water. Outside of the water, people usually don't think of sharks (since sharks can't survive very long on dry ground), but this house seems to be some sort of exception. They weren't safe even in the comfort of their own home from the shark as it seems. He came right into their roof and was there to stay.
The two men walking in the street don't even seem to be phased by this strange sight. It's as if they have seen it before...maybe there is something going on in this town.