A fantastic mashup! If you're incredibly familiar with all of the sources used, then some bits might surprise you, but for the uninitiated, this is a fantastic short. Definitely the highlight of the group effort.
Now that is a cool mesh-up. Mixing Aliens with zombie movies was a great idea and works surprisingly well most of the time. Not all scenes are perfect, some are not fitting too well or not perfectly executed, but overall: awesome work. (4 stars)