Sometimes the best part about going to the movies is the trailers. (This is especially true if you plunked down hard-earned money for something like 'Jack & Jill.') 2011 was no exception, thanks to a boatload of great marketing clips designed to pitch your anticipation levels right around fevered. Unfortunately for 'The Dark Knight Rises,' 'The Amazing Spider-Man' and 'Snow White and The Huntsman,' not all trailers were created equal -- despite incredible amounts of hype, none of those films wowed in trailer-form the way these 11 managed to do. From the absurd ('Arena') to the awe-inspiring ('Harry Potter'), here are the best trailers of 2011.