Stump the chump - variety

[Theisey]

The holder is in possession of a ball when he is controlling it for a kick as in this case with the ball held on the ground.

The exception to the dead-ball/down-over rule only applies when the holder has to rise to catch a high snap and he immediately gets back down on his knees to spot the ball for the kicker.

The exception does not apply once the holders knees have come off the ground to recover a snapped ball that he had muffed or fumbled or had to chase down for whatever reason.

It's all detailed out in rule #4.