In "Oh No Not Susan," "sighed" and "sigh" in the lines "And then she sighed" and "Look at her sigh" are both sung to a pair of notes with a slight descent (A G), giving something of a musical impression of a sigh.
Coinciding with the line "And then she laughed" in the second verse, the violins start playing tremolos, somewhat representing that laughing in a musical way.