When Kurt (Chris Colfer) steals a video of cheerleading coach Sue Sylvester (Jane Lynch) performing Olivia Newton-John's "Physical" to a Jazzercise routine, the glee club members decide to post it on YouTube as a prank.
After apologizing to Emma and presenting her with flowers, Will sees a depressed-looking Quinn (Dianna Agron) in the hallway and realizes that she is responsible for the list.