Quote (RestrainedLove @ Jul 3 2014 12:40am)

Are you kidding? It doesn't matter if Herrera hit the ball first. Vlaar cleared the ball. If he hadn't hit the ball, but only the face of Herrera, then you have something to debate about as Vlaar would be too late.

Also, by stating that you think it's dangerous play means you can't argue it should be a penalty, since dangerous play will result in an indirect free kick and not a penalty.
Perhaps you're looking for a kicking foul, which it definitely wasn't.