This is one of these short features that you might see in the cinema ahead of a main feature that can't quite make it to ninety minutes - and it's fine. "Scrat" is preparing for the bitter "Ice Age" winter by hoarding his collection of nuts in the stump of a dead tree. About to complete his collection, the last one steadfastly refuses to take it's place in the middle of his store. Try as he will, it keeps popping…