An ER doctor sends multiple patients to Elliot Reid during a night shift.
When Elliot, J.D. and Turk were "in charge" of Sacred Heart for one night, Elliot had to constantly put up with the ER doctor who kept sending her patients he didn't know what to do with, including one with heartburn.
Earlier, it was mentioned that he likes working the night shifts because he is "up already." Carla jokes that his scrubs are made of hemp, thus referring to the fact that he may be high.