Yup, foul and he got penalized for hitting the head. End of story. Dirty play? Wtf, Harvin fell down as bush was already going for hit. Bad situation. I also would have been fine giving him another 15 for celebrating like a jackass...
There have been tons of studies showing that these new rules aren't doing ANYTHING to limit concussions in the NFL. Most concussions and other head injuries don't actually come from these big green light hits. It's actually the repetitive smashing of linemans hitting each other over hte course of a game, a linebacker shooting the gap and hitting a running back, a slot receiver in a screen tackled from behind hitting his head on the ground etc....It's an unfortunate aspect of the game and just penalizing for tatgeting heads (which is a good thing) unfortunately will have a small impact on head injuries