4x02 "The One with the Cat"

A cat enters the coffee house and sniffs around Phoebe's guitar case. When Phoebe picks the cat up, she believes that her dead mother's spirit is inside it. Joey tries to sell his entertainment unit and when showing a customer that it is big enough to fit a grown man, the customer puts a hockey stick through the handles, locking Joey in and steals everything in his and Chandler's apartment. Monica dates Chip Matthews (Rachel's ex-boyfriend), the most popular boy from her high school, but dumps him after she realizes he is an immature loser who still lives with his parents.