Codes and Conventions of similar genres

Normally, the codes and conventions included in the thriller genre are mainly to do with sound and editing. For example, quick cuts and different camera angles and the music to reinforce the tension within the movie.

Lighting is also typical of the thriller genre, and so are mirror and stairs. 

In hostage-type situations, there would always be a place of torture, somewhere dark and creepy looking without any chance of escape, very dim lighting, possibly tied up in on a chair and gagged. 



Possibly with a gun pointed at their head, threatening the police that if they don't come up with a certain amount of money in a certain amount of time then the person will die.