He deliberately plays the ball with his foot but does not apply enough power to his kick and the ball stops at the Penalty Mark. A player from the opposing team sees this and runs toward the ball to kick it for a goal. The Blue GoalKeeper sees him and before the opponent can reach the ball, the GK runs to the ball and grabs it with his hands. IFK for the opponent. In this case, it was the GK's responsibility to know that he was not supposed to handle the ball.
Referees judge the facts.
That's because they do not have an Advice to Referees book. Good talking to you all. John, with regards to the call in question, I did give an IFK to the non-offending team. You are correct in that the Law was implemented to prevent time wasting. I agree with you there.