I was led to believe that the covering offical's arm in the air signals that the play is dead and the 45-second clock should begin for the next play.
Indeed, Hittner came in with one arm up, and
then signalled touchdown.
Didn't agree with the call, nor the non-overturning of said call. But when I saw the hand in the air, I said to everyone at the party, "Nope, didn't get it."
The other funny thing was on the offensive pass interference in the end zone when the back judge went to get his flag and pulled out his beanbag first.
