When Amy and Jonah make use of the giant pin art, at first the impression they make shows Amy off to Jonah's right, then suddenly their faces are directly lined up, top-to-bottom, with one another.
Jonah is always pro-worker and pro-labor, yet here he states his belief that all the attendees and the manager's conference are just "regular people" and not, as Amy insists, "total d-bags." Given his history of railing against the corporate structure, it makes no sense that he would suddenly stick up for upper management.
While in the photo booth with Jonah and Amy, Jeff says they'll say "best friends" on 3. He then counts to 2 and says "best friends."