Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.

Let me give you an example: Which writer rode Devon Loch in the 1956 Grand National?
The answer to this example can be: dick francis
Here is why: The answer is precise and accurately answers the question based on a fact. This is a good example

OK. solve this:
Ephialtes of Trachis was the traitor who showed the Persian forces a trail around the allied Greek position at the pass of Thermopylae, which helped them win the Battle of Thermopylae in 480 BC. He was portrayed as a severely deformed man in which blood-soaked 2007 movie?
Answer:
300