When studied in inernature, elders tell the real case:
Night. Regional morgue. Came from a remote region car with a dead body in the back - ZIL truck. As is often done in areas with accompanying corpse goes to ride to. In Zile - drove two cops intern and a corpse in the back. The car meets expert of duty shift and a pair of night nurses (usually our own students). Medics eagerly trying to get into the truck body. Resourceful driver can stop - "SCHA" and includes lifting body. The corpse of the truck safely slides feet first and thanks expressed mortis is standing on his feet, but only briefly. Slowly leans forward and folds in half. In this case, a short vocal folds corpse pulled terrible and quite loud roar. As a result, one of the officers-in-training fainted, others have described.