After Vassili lands in Stalingrad, the Russians try to advance on te Nazis through the square. While they are running, you see a guy get shot in the leg an he falls down with his hand on his cheek. Then when the Russians begin to retreat, their own officers fire on them. you see the same guy falling with his hand on his cheek. Hmmm... Dead guys don't get up, get shot again, and fall exactly the same way.