this movie be really bad and try to create scientific explanation for zombie always end up take away credibility from the history of the movie . there be so many thing i could point about the movie that i could almost write a book on how much the movie suck . for instance and there be like 50 people on the plane and they kill like 100 and they keep come and apparently the virus give hepatic complication because everybody have yellow eye and also the virus make people roar like lion or something and and the virus not only regenerate tissue a it also give superhuman strength and not to mention that this virus mess up people hair . it also important to notice that if you shoot someone with a pistol ( probably only happen on plane ) that person be kick back in the air . remember that if you be escort a prisoner on a plane and you loose him and always look inside the drawer and cabinets the size of a bottle and you never know where those bastard be go to hide . and if by any chance you can land a plane full of zombie against a mountain and survive ( happen all the time ) and after watch dozen of people be kill and just walk away from the plane and watch the sunrise and make joke about date the flight attendant . positive .