'Momento' Opening.

Conventions:

Immediately, there is a presentation of death and blood. Also, the timeline appears to be going backwards which creates several enigmas.

Camera:

There are several extreme close ups and close ups, which creates a certain hazy type of focus. It's unsettling.

Editing:

The first scene is edited to go backwards, so the photo appears to be 'undeveloping'. It is also in black and white in some party, creating a muted and dark atmosphere.

Sound:

The non-diagetic music is somber and melancholy. Sound echos at several places too.

Mise-en-scene:

Black and white scenes, adding a monochromic mystery.