October is here, which means Halloween is in the air. 'Tis the season of pumpkins, costumes, and of course — scary movies. Over the years there have been hundreds of horror flicks that kept us up all night, but what is the most terrifying film of all time? There are so many to choose from, so we've narrowed it down for you to 64. Just click here to vote on all the matchups, and be sure to stay tuned to Buzz to check out the results and fill out your bracket for the next round.