If he landed out of bounds, he had to go from heading parallel with the sideline to moving at an angle away from the field of play, hence, the ball crossed either inside or outside the pylon at some point. If it crossed inside, TD. If it crossed outside, it goes back to where it went OB.
If the play had started at B's 1/2 yard line and A1 was running a sweep wide and leapt at the last moment from the field of play, crossed the goal line, but the bal went inside the pylon before he landed OB behind the goal line without ever alighting in the end zone, it's a TD. If the ball was outside the pylon, spot it where it went out because it never crossed the goal line.
Touching inbounds means touching inbounds. Your foot, your knee, your toe - something touching the ground inbounds.
|