Analysing opening scenes from different films

HALLOWEEN 1978:

The scene opens with cricket noises in the background as the camera pans around house and a the same time, you can hear quiet talking and laughing inside the house. The quietness shows that the situation is normal and nothing scary has happened. The scene is set at night and as the audience, you can barely see what's outside which gives suspension. 

When the light goes out from the window, there is a sudden high pitch noise which increases the level of tension and could cause a bit of a shock. 

The piano playing fades in as the person behind the camera picks up the knife and slowly walks up the stairs (after the other man leaves). The music gradually gets louder as the person reaches the top of the stairs. The increase in volume of the music also brings an increase in tension for the audience as they are not sure of what's to happen next. 

Michael puts on the mask and as the audience, you can see through the mask from his point of view. He then stabs his sister constantly as she is screaming, at this point, the level of tension has reached its peak. 
Finally when his identity is revealed to the audience that he is a child and his parents say 'Micheal?', the level of suspension has also reached to the top because it leaves the audience at a cliff hanger. 

AMELIE 2001:

The scene begins with upbeat violin, with a calm voice over on top. A sudden car sound interrupts music increasing tension but continues with peaceful music throughout the scene. The colour scheme is yellow and green and seems to be a bit dull. Nearer the end of the scene short shots of different sound effects occur such as finger clapping, dominoes falling, wine glass, paper chains, string, coins. These diegetic sounds goes parallel with the close up action shots.

TRAINSPOTTING 1996:

There's a sudden start of two men running away from people, there's a variety of low angle shots of their feet and close ups of their faces, fast paced music goes with the scene. A voiceover is used to narrate, but is interrupted as he gets hit by a car but continues to laugh into the camera breaking the fourth wall. Next people are playing football which includes saturated colours and diegetic sound shouting, as the singing starts in the background Renton gets hit in the face by a football and is graphic matched with him falling over.The scene ends with him stating 'who needs reasons when you've got heroin' which leaves the audience laughing, this shows that this film could be a comedy.