Imagery: Marco and the chair
Marco bending down and hoisting the heavy chair over his head as he stares triumphantly at Eddie is extremely evocative, as it reveals Marco's strength and willingness to defy Eddie. It foreshadows their violent conflict later.
Imagery: Eddie's kisses
One of the most stunning images in the play is that of Eddie suddenly grabbing and embracing Catherine, then, as Rodolpho is protesting, kissing him as well. It stuns the audience/reader because it is a moment of irrational passion, evincing Eddie's true feelings for Catherine and perhaps alluding to some deeply-buried homosexual impulses of his own.
Imagery: Marco spitting
When Marco breaks away from the immigration officer to spit on Eddie and scream at him, it is a raw and powerful image of primitive justice and fury.
Imagery: Eddie dying
Miller saves the most dramatic moment for the end: when Marco turns Eddie's own knife on him and stabs him, causing Eddie to fall and die in Beatrice's arms. It is an image of classical power and pathos.