My cat is a friendly little soul and is very nosy when people come to the flat. I had my sofa cleaned today and a man helped to bring in the industrial cleaning machine then went out again. My cat arched her back and hissed at him, but when he left she was fine, just went into the bedroom to get away from the noise while the other man was working When he'd finished she came back in.
The other man came in again to help remove the equipment and she stared at him, but backed away slowly. What was all that about?