During the announcements and the unboxing of the Loot Crates, sponsors of tonight's show, Marisha mentions School of Thrones (2013), which is a web series Matt produced in about 2012 that is seemingly a parody of Game of Thrones and a John Hughes film.
Sam's mug usually has a sticker/message on the bottom, tonight's is: a picture of Matt doing the Donald Sutherland pose from the end scene of Invasion of the Body Snatchers (1978).
Sam does his first wearing of a t-shirt with another cast member on it, it's a mimic of his mug, Matt in a Donald Sutherland pose of the end scene of Invasion of the Body Snatchers.