I am learning English watching American sitcom, The Office. While I am watching season9 episode 18(Promos), I found some expression like below and I don't know what it exactly means. Please help me if anybody know this drama or know the meaning of this sentence.
(The workers are watching their documentary promos.)
Announcer: The workers. The lives. The loves. The people. The paper. The Office: An American Workplace. Coming soon on WVIA.
Kevin: Whoa! You go to the bathroom for forty-five minutes and...everything changes.
(Scene changed and interview with Kevin)
Kevin: This is a documentary? Oh! I always thought we were like specimens in a human zoo.
The bold part is implicative expression? or just Kevin said after going to the bathroom, everything changed?