Peter Dinklage is an American actor with dwarfism who stands at only 4' 5", and he plays Tyrion Lannister on Game of Thrones.
Woody told Steve to go bring him the head of Tyrion Lannister. Failing to comprehend that Tyrion is a fictional character, Steve instead decapitated Dinklage himself using a saw and mentioned that Dinklage himself screamed, "I'm just a bad actor! It's just a role I play on a TV show! Why are you doing this to me...." although wanting to impress Woody so badly so that he can get invited to the award ceremony being hosted by then President Barack Obama, Steve just kept sawing anyways ignoring Peter's pleas. Woody gets shocked over this, and so he decides just to mount Tyrion's head along with "the rest of them".