The ruling on the field is a fumble.
A player who makes a catch may advance the ball. A forward pass is complete (by the offense) or intercepted (by the defense) in the field of play, at the sideline, or in the end zone if a player, who is inbounds:
The ruling on the field is down on the one yard-line.
If a scrimmage kick crosses the receiver’s goal line from the impetus of the kick, the following shall apply:
The ruling on the field is a first down.