Free Cars 2 movie voucher (up to $7.50/limited amount per hour) on Facebook

Walmart is giving away vouchers for $7.50 off tickets to the Cars 2 movie every hour.  You must "Like" their Facebook page.  About four minutes before the hour, click on the Mater's Secret Mission tab on the left hand side. If it doesn't say, "All Vouchers are Taken for This Hour" then that means they have some left.  Just pick a person to send a message to, doesn't matter who. I just got two of them, you are allowed two per Facebook account.