 However, in the season finale, Sheldon leaves temporarily to cope with several changes and Amy becomes distraught.However, 45 days into the trip, Sheldon gets mugged and calls for Leonard to drive him home, only to be confronted by Amy, who is upset over not being contacted by him in weeks.When Sheldon admits he did not call her because he was too embarrassed to admit that he could not make it on his own; Amy accepts that he is not perfect.