Harry Potter and the Prisoner of Azkaban - Out of Sequence
When the shrunken head is counting down, it says "10, 9, 8, 7, 6, 5, 4, 3, 3 and a half, 2....." Three and a half is actually more than three, so it should be two and a half.
i noticed that aswell but i don't think he ment to be 100% right, he was just counting down in his funny jamacia way, but you're right it is a kind of slip-up
Who cares if the shruken head can count or not I was too busy enjoying the movie too notice that some head can't count backwards. Besides the head can probally count better than I can!