During the riot, Stone is stabbed with the shiv in his right side. After removing his jacket, the blood stains are visible on his right side. However, after he is thrown to the ground on his back at 1:20:40, the blood stain is seen on his left side.
At approx 16 minutes in, when the Russian prisoner slams the new prisoner's head into the food tray, food flies and the tray bounces up and off the table. The tray is then immediately back in place with no food spilled from it.