Ending a sentence with period indicates that the speaker feels that there is no further need for discussion and has said all there is to say on a subject.
Some Excerpts:
From TV shows, movies and novels
Desperate Housewives
Nicollette Sheridan (Edie Britt) used the word “period” at the end of the sentence while talking to Teri Hatcher (Susan Mayer) in the popular TV [...]
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Pull something off - to succeed in doing something difficult or unexpected
Excerpts from TV shows, movies and novels:
Sex and the City
Carrie Bradshaw(Sarah Jessica Parker) used “pull off” in her conversation with Samantha Jones(Kim Cattrall), Miranda Hobbes(Cynthia Nixon) and Charlotte York(Kristin Davis) in the first episode of first season of “Sex and the City”, as shown [...]