is this a confirmation or just a guess like me lol
Confirmation
I saw someone play, he joined the dark brotherhood and there were corpses around the torture room. He could lift them in the air and of course the first thing he did was placing them in awkward positions
So you could use a corpse as a bag to carry extra loot while still having speed. At least until the entrance/exit. Then you'd have to move slowly again.
Heh... "My luggage is part of the rotting corpse line..."