When a punt returner fair catches the ball, do you bag that spot?
Sometimes.
It depends upon how far the catcher wonders away with the ball. But most fair catches occur well away from the goalline. There's no burning need to sell the call. A bag on the ground is worth more than a foot down.
What's your call on this, Hoss?
An airborne Team A pass receiver grasps a forward pass,
touches down with both feet off balance at the B-2,
immediately falls forward,
extends his arm such that the ball breaks the plane of the GL,
as he hits the ground, the ball drops from his hand.