Intentional grounding penalty enforcement

[MNBlue]

Originally Posted by stegenref

We had a dispute amongst our crew the other night on how to enforce this penalty. Quarterback rolls out to his left, well out of the tackle box, and throws the ball out of bounds as he's getting pressured. White hat throws his flag for intentional grounding. The question then came up...is it 5 yards from the previous spot or five yards from the spot of the foul (i.e. where the ball was thrown)? The flag was laying about 5-7 yards behind the original LOS>

There are 2 times when the tackle box matters: in the NFL, and on the lake while fishing.