It's always the first Tuesday of November; High School Musical 3 increased by 66%, Beverly Hills Chihuahua increased by 86%, the dropped 70% and 62% respectively on Wednesday. In 2004, Shark Tale increased by 43% and then fell 58%. This is all very normal.http://www.boxoffice...der=DESC&p=.htmhttp://www.boxoffice...der=DESC&p=.htmAs to why, your guess is as good as mine.