Ice Age: Continental Drift / Scrat's Continental Crack-Up (Full Trailer)

The squirrel, who's surprisingly still alive, is still on the hunt for this acorn. Is it laced with something? Cause that could be the only way to explain why he keeps on chasing it.

The short is obviously a promo for "Ice Age: Continental Drift," the fourth film in the popular "Ice Age" franchise that's directed by Steve Martino and Mike Thurmeler.

The Best 10 Movie Posters in 2010 Yahoo

10. Buried
This bold, Vertigo-esque image is a nice tip of the hat to designer Saul Bass, invoking some of the best of Hitchcock's thrillers.

9. The Expendables
Sure, it looks like it belongs on the back of an Ed Hardy shirt, but it communicates everything you need to know -- and no old-school action movie fan could resist a lineup of stars like that.