http://www.facebook.com/walmart?sk=app_155145334550633 -click get started. You have to send a message to get the tickets, and they open it up every hour. Start doing it a few minutes before the hour so you’re ready. This will probably go really fast each hour so it might take a while to get though.
Update-the credit is only for $7.50, so it won’t make the movie free at a lot of theaters.