You may recognize Nicolas Cage from classic American films such as "Leaving Las Vegas", "The Ant Bully", and "The Expendables 2". You may also recognize him from this photograph, being sold on eBay, which dates back to 1870.
Yup. Nicolas Cage is an immortal vampire.
That explains why he's so bad at imitating human emotions! It's been centuries since he's felt anything. That kind of time will affect your acting.