I assume this is a result of when he led with his knee and collected Api in the sternum. I actually noticed him do the same thing earlier in the game.
http://www.nrl.com/sue-facing-a-one-week-ban/tabid/10874/newsid/110049/default.aspx
http://www.nrl.com/sue-facing-a-one-week-ban/tabid/10874/newsid/110049/default.aspx