shurgs

Not even the armour of a primarch could withstand the impact of a falling starship, and Horus grunted as he pulled a twisted spar of jagged iron from his chest. Sticky blood coated his armour, the wound sealing almost as soon as he had withdrawn the metal. His genhanced body could easily withstand such trivial punishment, and despite the spinning fall through the decks of the ship, he remained perfectly orientated and in balance on the slop­ing deck.
He remembered the sound of tearing metal, the clang of metal on armour and the sharp crack of bones snap­ping as Astartes warriors were thrown around like children in a funhouse.

False Gods pg. 140