Read the excerpt from act 1 of The Monsters Are Due on Maple Street.

DON

And he never did come out to look at that thing that flew overhead. He wasn't even interested.

(he turns to the faces in the group, his face taut and serious)

Why? Why didn't he come out with the rest of us to look?
CHARLIE

He always was an odd ball. Him and his whole family. Real odd ball.

Which element of drama is highlighted in the stage direction?