"Steppin' Out"

In the section of "Steppin' Out" where the line "I'm steppin' out; I'm steppin' out" is repeated, that second "out" is sung alternately with a glissando (B to G) and a melisma (alternating between B and C#, I think).  When "I'm steppin' out; I'm steppin' out" is sung through a vocoder, that second "out" is sung with a different melisma (G B D).  All of these give something of a sense of movement.