Some people from Australia are going to be lucky!!!
Event Cinemas just posted on their Harry Potter Facebook page:
Who all is making their way to Event Cinemas this weekend for 'Harry Potter and the Chamber of secrets'? Here's the scoop: Make sure you pick up the last poster from the prior weekend because once you collect all 7 there is a SECRET HP image on the back! Second, only Event Cinemas has the exclusive 4 minute clip of 'Deathly Hallows Part 2' that you DO NOT want to miss!
Thanks Tyler Cullen for the tip
Source: Event Cinema
Photo by Warner Bros. Pictures