At least when you're standing in a wall waiting for a free kick to be taken you fully expect to get hit. Van Persie was completely unaware and vulnerable, and that can sometimes be crucial. For example, when Drogba collided with Ruddy during the Norwich game, he was struck by some force in the air, but I don't think that would have been nearly enough to knock him out had he been fully expecting to be hit. Of course, there's also the issue of how he was hit, because Drogba was turning his head toward Ruddy as he was hit, but similarly, van Persie could have turned back as Williams booted the ball and could have been hit in a much more dangerous manner. And like Ramzi was saying, Williams could have missed his kick and booted the back of van Persie's head or maybe even his neck. Anything could have happened in that situation and things could have turned out much worse for van Persie. Would he have died? Not very likely, but he certainly could have been hurt very badly on a different day. Having said that, I'm not very happy with Ferguson, either. That man is overenthusiastic when bad things happen to his players or his team, but he's very often been disgustingly apathetic about the wrongdoings of his players to other players.