I already knew I was kind of like Sarah Silverman , both in how I look and how I act , but then I saw this promo . That is * exactly * what I do when I ' m frustrated . I showed it to Corina , and she spun around and pointed at me .
According to the above context, answer the following question.
What led Corina to spin around and point at her friend after seeing the promo ?


She was amazed at the similarity between Sarah Silverman and her friend