As time expires before halftime, the offense throws a deep pass and the defense commits pass interference. The flag is thrown, the penalty is marked off, and the offense is given 1 untimed down because the clock had ran out, and the half cant end on a defensive penalty. The offense lines up to run a play and then jumps offsides(fasle start). Should the offense be moved back 5 yards and given another untimed down, or is halftime? This happened in a game, and the rules book or the case book does not cover this particular scenerio.