That was just wonderfully executed. The jokes were perfectly spaced from each other, not to close together as to become tedious and not to far apart as to become inconsistent. Although not shinning in the animation category it doesn't lack. The sounds was ok, but the voice quality could have been better.
I loved the part that showed Fred being attacked by the other members of th gang who were zombie. It made me lol. The only part that seemed to bore me was the plane scene.
And oh, that guy who was wearing the sweater near the end sounded just like Caboose from Red vs Blue!