I don't understand how Mitchell's hit on Eifert was worthy of a defenseless receiver flag, but the hit on Heath where he jumped to make the catch and the defender went low and cut his legs out, flipping him backwards causing him to slam the back of his head and neck on the turf, wasn't worthy of one. Don't get me wrong, I don't think it should have been a penalty, but if hitting a guy when he leaves his feet horizontally warrants a flag, shouldn't a guy leaving his feet vertically get the same protection? Slamming your head backwards off of the ground might actually be more likely to cause a concussion than a helmet to helmet hit.