sound
in trainspotting various needle drops are used throughout the film. this is normally to set the tone or mood for the scene. one of the most prominent examples of this is the scene in the nightclub where atomic by sleeper plays in the background
editing
in trainspotting a vast majority of the editing is used when Renton is withdrawing from heroine. this is done so we can see how Renton is feeling as he is hallucinating and obviously feeling nauseous.
mise en scene
in this scene mise en scene is used to show a typical pub in the 1990 as how begbie reacts when he is drunk
cinematography
in this scene various angles and shot types are used but here spud is caught in a medium close up side angle