Both "Rotten Bodies" and "At Last" is classic Horror movie reference. In roughly 2/3s of the movie they usally let the most discusting zombies fall apart a bit to give the crowd some gore scenes to mark that the story gets even worse.
"At last" is at the end of a horror movie. There is always something in the way of the heroes, like a locked door, a lost car-key, storm that stops them from escaping and so on.
You left out one:
"A stupid, screaming hysterical blonde..."