This is the original sketch of a drawing I made nearly a year ago.
>>2232107:https://derpibooru.org/images/2232107
In this drawing, Shining Armor and Flurry Heart both happen to get the call from nature at the same time. Given that Flurry is still being potty-trained, Shining decides to take advantage of the situation by showing her how it's done. Although in retrospect, since Shining is reading the newspaper, Flurry probably should've been given something to read as well.