Thoughts on a loose ball/3 seconds call?

[Adam]

If the player involved has, say, just one foot in the lane during the scrum, I might not call it. Normally, however, there are going to be 2 or 3 offensive players going for the ball.

Also, the longer the scrum lasts, the more likely I am to jump in with the call. And if I don't make the call early, A will have a very short window to take a shot or get out of the lane before I make a call.