Memento (Nolan, 2000, US)

We learnt the difference between a Horror and a Thriller:
Horror: The audience see the murder onscreen; the audience are scared of whats happening; the audience don't have to work very hard to understand what's going on; aimed at a younger audience.
Thriller: The audience don't see the acutal murder taking place or any gore; it's not what's happening that scares the audience, it's the threat of what might happen; the audience has to work harder to understand a thriller; thrillers are aimed at a more mature audience.

The film we are watching is Memento (Nolan, 2000, U.S.).
It constantly makes the audience ask question like "who's that?", "why did he do that?" and "what is going on?"
Some other conventions are; crime, non-linear narrative, violence, murder and the things that happen are not obvious.