"Mr. Blue Sky"

In the chorus of "Mr. Blue Sky," the "so long" in "Please tell us why / You had to hide away for so long" is sung with two glissandi: the "so" stretches from F to D, and the "long" from D to C."  The echoing "so long" in the backing vocals has a similar feature: the "so" has a glissando from C and A.  The breadth of pitches that these glissandi encompass gives a musical sense of just how long Mr. Blue Sky has hidden.