Analysis of Double Indemnity- is it a good opening sequence?

Is the opening sequence to Double Indemnity a good opening sequence for a thriller?

As the opening sequence for Double Indemnity is a thriller opening, it includes all the vital elements that is needed to make it a successful opening. The majority of opening sequences familarise the audience with the setting whihc surrounds the main character, however Double Indemnity does not do this. It shows a dark silhouette of a injured character using crutches to walk. The fact that the character has injured limbs means he has been in some kind of danger which relates to the genre of thrillers well.
As the opening sequence is slow paced, it acts as an outreached out which guides the audience into the film and makes sure that the audience understands the plot so far. It always helps the viewers get into the film if they are not thrown straight into the action of the film and the vital information thta is needed to be processes is at a minimal amount so the audience can concentrate on the film.
Seeing the injured male slowly make his way to the front of the screen could set a certain mood/tone about the film just through his actions and words. Perhaps as he doesn't say much to the audience, they are cautious about him.
The music soundtrack that plays while the male character makes his way to the centre of the frame sounds quite military which represents the feeling of war and death- maybe the character on the screen represents the theme of war as there was a problem between him and a fellow character and they must have had a fight for him to be injured. This also feeds into the genre of a thriller. The audience may feel quite uneasy about this character and may regret to show sympathy for him later on in the film.