"Ice Age: Continental Shift" Teaser Trailer "Scrat's Continental Crack-Up"

Went to see "Guliver's Travels" in the cinema the other day. Loved it! But at the start, the audience were treated to a short film that featured Scrat from the "Ice Age" film series. The short was titled, "Scrat's Continental Crack-Up". It was so funny. It's a basic set up for the fourth film in the franchise, "Ice Age: Continental Shift" which hits cinemas next year.
Here's the link to the trailer: http://www.youtube.com/watch?v=BQMuqmrA2aU