People See Big Things
For those of you listening to the lyrics, you probably noticed that they sound pretty cool but defy any coherent or obvious meaning. And, by the way, that's not a problem. I'm not saying songs have to have any deep significance to be good. And sure it's fine for ambiguous words to have different meanings to different people. The point is, the superfans don't just offer possible or plausible interpretations, they take to their blogs insisting they have the answer, like this Oasis fan who is positive it's an autobiographical song about the Gallagher brothers' absentee dad, particularly the enigmatic lyric about "slowly walking down the hall / faster than a cannonball."
But the Song Is About So Much Less
Shocking as it may be that a blogger is wrong, the lyrics to "Champagne Supernova" are not intended to tell any coherent story except, perhaps, indirectly, the story of how Noel Gallagher likes getting high and doesn't sweat lyrics too much. In 2006, Noel said he hadn't made up his mind what the song is actually about, adding on the band's website that some of the lyrics were written when he was "really out of it." As far as the "faster than a cannonball" lyric, while Noel defends an ambiguous lyric's right to exist (and I agree with him), he doesn't fucking know what it means. Although, maybe he changed his mind because he also once claimed it was about a slow-walking character from a British TV show, but he "couldn't think of anything that rhymed with 'hall' apart from 'cannonball.'"