Offsides (neutral zone infraction actually, meaning the offense false started because the defense was offsides) was the next play, PHI was backed up near the goal line and ATL gave them 5 yards with that penalty and really hurt their chances of getting the ball back.
Oh well. Good for the Eagles, they host the NFC Championship game.
I think Atlanta knew they had to gamble and try to time the snap to try to get the Safety.