When a fan of a certain series point out the smallest things from a clip or scene that have to relevance to the plot because they're running out of content to Tweet about
The phrase stemmed off a Tweet from @hourlydolores, an Encanto fan account dedicated to tweeting out hourly images of the character Dolores Madrigal, with the caption "I never realized she was holding a plate with corn in this scene" with an image of Dolores holding a plate of corn.
Person 1: "Guys look! This character was kneeling down while everyone was standing up!"
Person 2: "Plate of corn moment."