SportsPulse: Crazy comebacks and devastating injuries defined a jam-packed Sunday. USA TODAY Sports' Mackenzie Salmon reacts to all the biggest story lines from Week 2 around the NFL. » Subscribe to USA TODAY Sports: https://bit.ly/2L0ktE1 » USA TODAY delivers current local and national news, sports, entertainment,  finance, technology, and more through award-winning journalism, photos, videos and VR. #nfl #nflweek2 #usatodaysports