Zombie Chomp (2003)

Three friends flee a mob of quick moving zombies at the beginning of this short flick, only to have one, Colin, immediately caught and eaten despite his friend Chad's attempt to save him. Enrique, on the other hand, runs like hell and finds safety in the basement of a nearby house, barring the door from inside. Chad follows and manages to shut himself safely inside the ground floor level and secures the building against zombie attack.