It happens quite often in the Halo:CE. Whenever a corpse's body part hangs off an edge, the body part stretches at very awkward angles. An extreme case of this can be witnessed on a level where there are stationary energy shields. If a player standing on one dies, and the shield goes down, the body will float in midair in an extremely contorted manner. This is due to the fact that, unlike the other Halo games, there are only a few death animations, unlike in Halo 2 and 3 where the body can end up in any position. If the body rests off a ledge, the programming of the game tries to bring part of it down to a solid surface, but if the center is on a surface then the game engine won't make the body fall off the ledge. Halo CE's ragdolls, colloquially known as dead bodies, do not abide by any p