That's maybe part of the reason that genres exist: we recognize them from our lives. You're walking home late at night down a dark street, and all of a sudden your mind turns it into a thriller. You get nervous about who's walking behind you. Or you meet someone and you're falling in love, and all of a sudden, all the cliches, like "it feels like a movie," all of the cliches come [true]. Or you're camping and it feels like a nature movie. You could analyze that quite a bit in terms of chicken and the egg, whether our minds are imitating genre or whether genre imitates these modes that we find ourselves in. I'd like to believe that film imitates life... and the things that ring true enough to be established as genres have seeds in human experience.