There was something so panther-like in the movement – something so unhuman, that it seemed to sober us all from the shock of his coming…As the Count saw us, a horrible sort of snarl passed over his face, showing the eye-teeth long and pointed; but the evil smile as quickly passed into a cold stare of lion-like disdain.
– Bram Stoker
Dracula, Chapter 23. Van Helsing and the four other men at the house in Picadilly are surprised by Dracula when he leaps into the room. They had expected to see him, but his inhuman, wild animal appearance shocks them.