But my very feelings changed to repulsion and terror when I saw the whole man slowly emerge from the window, and begin to crawl down the castle wall over that dreadful abyss, face down, with his cloak spreading out around him like great wings.
– Bram Stoker
Dracula, Chapter 3. A frightened Jonathan Harker sees Dracula move down his castle walls "just as a lizard moves along a wall." He is starting to realize the Count is not quite human.