[link to original on tumblr]
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While notating the chorus (I've been on a notating spree recently; plus, it just makes it easier to record since I don't have to keep everything in my head), I noticed that (starting at what the "voice from above" says) the note values become progressively shorter:
"You can do it" is in the backing vocals, and between that and the increasing frequency of the notes, there's a sense that Horace Wimp is gaining confidence in himself.