Learn the rules. That's what they say.Wow.
It's intentional even though he didn't mean it.
http://news.bbc.co.uk/sport1/hi/football/rules_and_equipment/4524354.stm
"Referees look at two specifics - did the hand or arm go towards the ball or in a manner which would block the ball, or is the hand in a position where it would not normally be?"
Yes and yes.
Wow.