Who'd have thunk it? Pascal Pape pretending to be injured?
World Rugby's official line on this is as follows: 2016 minor law amendments recap:
Play acting or “simulation” will be specifically outlawed in the game in a move that formalises resistance to a practice that has been creeping into the game in recent years. Any player who dives or feigns injury in an effort to influence the match officials will be liable for sanction. Previously, such offences were covered under the laws covering general acts contrary to good sportsmanship.