Mayella Ewell is called to the stand. She testifies that she asked Tom Robinson to chop up a dresser in return for a quarter, and that when she turned around Tom attacked and raped her. In cross-examination, Atticus shows that Mayella is terribly lonely. When Atticus asks Mayella to identify Tom, and Tom stands up, it becomes clear that Tom's left arm is useless: it was destroyed in an accident. If Tom can't use his left arm, then how could he have beaten and raped Mayella? Atticus asks Mayella wasn't Bob Ewell the person who beat her? Mayella refuses to answer.