How does the author use foreshadowing in The Homecoming?

There are two important elements of foreshadowing in the first scene. First, when Max talks about being able to understand a female horse through looking in her eyes, we get the feeling he's talking about women as well as about female horses. This foreshadows what will happen between Max, his sons, and Ruth later in the play. Later, when Max gets mad at Sam's mention of "other people," we sense that
Max thinks Sam means someone in particular and wonder if he's actually talking about Max. This foreshadows what we find out later about Max's wife Jessie.