That Fflutie kick was not a pooch punt. It was a drop kick field goal, and a scorinfg play but with a different technique from a usual afield goal and different technique from a punt.
On a punt you kick it as it falls to the ground. The drop kick must bounce on the ground before being kicked, or in reality just as it touches the ground, jusut as the during the field goal, the ball is placed on the ground first.
Since the grounding must happen first, what if a punt coverage guy were to arrive at the punted ball and kick it through the goalposts while it was lying there, instead of downing it by touching it with another part of his body. Would that be the equivalent to a drop kick field goal???