From what i heard from the commentators on the radio and what ive heard you all say.
Martin was knocked down by two ASU players and one of the put his hand under his helmet and hit him in the throat during the hit and wouldnt not let him up, after he got up he was having a hard time breathing and took off his helmet as he was walking to the sidelines. Eckler the LB coach was mad because he thought Martin was mad after the hit but after he realized Martin was in pain and having a hard time breathing he was mad trying to tell the refs that he took off his helmet to breath better. The trainers were with him on the sidelines trying to get him some oxygen after the kickoff.
Eric Martin only learned to keep his helmet on until after he gets to the sidelines. Still it was a bad call for the personal foul.