In the scene where Blue Duck has Ermoke, Monkey John and the remaining Indians chase after Gus, they fire a shot at him making his horse buck. He's drinking from his canteen and it falls to the ground. When he spurs his horse to outrun them, his canteen is back on his saddle. [GUS WAS ON A TRACKING EXPEDITION THAT WOULD TAKE MANY DAYS THROUGH HARD COUNTRY. HE HAD MORE THAN ONE CANTEEN.]