Doing quests for The Dark Brotherhood, ive now assassinated 5 or 6 people who were in bed, asleep.. ALL of them fell through the bed, and under/out of the map completely.. One was in a haystack on the ground just outside whiterun, and fell completely through the world.. Obviously none were then able to be looted, and their bodies are nowhjere to be found.. On PS3.... Naturally....

I just found the one body outside of whiterun, and 50yrd up a hill and through some walls....