As they sing their way into the balloon, Pierce did drugs which caused him to sever a rope and unmoors the basket, setting it off on an untethered course without its operator (Sara Bareilles).
There, they meet a mountain man (Jason Alexander) who feeds them berries, which cause a hallucinogenic reaction in all of the study group members.
Back in the study room, Shirley recounts the time when she thought she saw her husband Andre with another woman at a supermarket and followed him for hours, only to find out it was not him.
When the other members of the group tell her that it's the first time they've heard of this story they realize the berries also caused them to forget most of the details of the night, and they have all been embarrassed by their own secrets.
Annie let Professor Cornwallis rub her feet in exchange for answers to a history test she was struggling with.
[2] The premiere airing did not use the original end tag (since they were shown the previous week as a teaser); instead, a collection of outtakes and behind-the-scenes footage set to music was used.