Which of the following scenarios exemplifies extinction? Alexis uses cocaine. She no longer feels quite the same rush as she did when she first started using. Alexis is a former cocaine user in recovery. After a relapse, though, her hands shake and her heart pounds when she hears a car pull into her drive, like her dealer used to do in his car. Alexis uses cocaine. She finds that she is slowly losing her sense of smell. Alexis is a former cocaine user. Now that she no longer uses cocaine, her hands no longer shake and her heart no longer pounds when she hears a car pull into her drive,like her dealer used to do in his car.