2. An Actual Dead Stag
Image: YouTube
Game of Thrones pays lots of attention to authenticity. When Twin Lannister is introduced in season 1, he is shown skinning a stag. (The stag is the sigil of House Baratheon, so it is a sign of how the Lannisters are coming for them.) In reality, actor Charles Dance was actually skinning a dead stag with a knife.