When the sheriff of Rottingham is thrown from the catapult by king John, he crashes through the roof of Latrine's room and lands on the bed. When it shows the next shot, you can see that the bed and the sherif's pants and boots are covered in white powder and bits of plaster from the roof. After Latrine starts jumping all over him, there is another long shot and you can see that all the white plaster and stuff is gone from his boots, and they're back to shiny black.