This is your captain callingThis is your captain callingTo tell you I'm out of my brain againThis is your captain callingAnd if you think we're fallingYou're perfectly rightAnd I'd be delighted if any of youCould give us a hand and land the plane
In the line "And if you think we're falling," "falling" is sung to a descending pair of notes, providing a sense of its meaning. It's only a small interval (a whole step: F# to E), but it's somewhat conspicuous because up to that point, the melody ascends and holds steady ("And if you think we're" is sung to the notes C# D E F# F#)
In the line "And I'd be delighted if any of you," the phrase "any of you" is sung to notes of all different pitches (A G# F# E), giving a sense of the breadth of "any."
The line "Could give us a hand and land the plane" exhibits internal rhyme ("hand" and "land"), hinting at the stability that would result from "land[ing] the plane."