Verse 1: description of relationship

Light switch, man switch — a biting parallel to how the relationship dynamic of narrator was. It's a fling, a casual relationship where partners' affection fluctuates with regularity of a light switch.

Film was broken only then — this line is a reference to the chorus. The experience, the memory, the emotions of relationship was disjointed, incoherent when it happened, but now narrator has a full clear picture of it after it ended.

All the night, fused tomorrow — I feel narrator describes characteristics of their sex life. They did sex "all the night" to the point of exhaustion and often woke up the next day "fused".

Dancing with a distant friend — this connects to previous line. During night, the passion was reeling and overflowing, but during day they acted casual/regular friends (not close friends, but "distant" friends). This dynamic is comparable to "dancing", where you get all in with dedication for a period of performance but once you finished you both separate and go about your days.

Verse 2: breakup

So we left, understanding — both narattor and their partner undestood why they have to end their relationship

Clean cut so we're sounding fast — "clean cut" means here that they had no fights, emotional baggage or some other shit typical breakups have. Therefore, their talking "sounds fast": no hesitation or doubt, reconciliation attempts and so on.

Talked of sad, I talked of war — this line is not about partned being sad and narrator being angry, because of previous two lines. Instead, I suggest this. Partner talked about missing potential of relationship and how they wanted to see where this goes, while narrator argued about why relationship is bad and has no future and glad that the relationship is finally ending.

I laughed and climbed the rising cast — cast being an object here does not make sense, because of metaphor redundancy. Instead, I think cast means here "a set of characters or persons". Narrator was happy after relationship and was taking on new relationships confidently like someone climbing a mountain/hill.

Verse 3: delayed introspective response

Quickly I remembered — suddenly, out of nowhere, a memory hits them.

Fused and saw a face before — narrator remembers the sex from relationship described in first verse.

Timing reason, understanding — They reason their logic and understanding, measuring how it transpires in their head and deconstructing it (“timing"). They try to reassert the conclusion of that relationship being doomed.

Like association hall — this deconstruction is failing and leads to free association.

Chorus: nostalgia

Filming and screening — here, making a film scene inside the head

I picture the scene — they picture the sex scene

Filming and dreaming — here "filming" changes meaning to something akin to 'playing' or 'recording'. This scene is so powerful that the memory (or exagerated fantasy) self-reinforces.

Dreaming of me — narrator imagines their own sensations, how they move, what they sense, what they feel, as if they transported back to this moment of sexual bliss.

Outro: signs of bad times coming

Dreaming of me / Just dreaming of me / It's only me / Just me — in the context of outro, "dreaming of me" completely changes meaning. Instead of imagining them with the person during sex, now they imagine only themselves alone. That is singer’s creeping loneliness.