You make the Call

[CJRef]

We're not talking about taking your eyes out of your primary and following the flight of the ball, but you absolutely have to know the status of the ball, regardless of where you are at and what is going on in your primary. This includes whether or not it is going in. You may not be able to tell with 100% certainty that it will drop but you should have a good idea. If it goes in you need to know in the event your partner(s) need your help and if it doesn't you should be anticipating where the rebound is going to go in order to get a better look. I'll admit that it's a skill that takes time to develop, but I believe it's a very necessary one. To me it's like the difference between looking a couple of seconds ahead when you're driving and just seeing the break lights in front of you or looking a few more seconds ahead and seeing the wreck three cars in front of you and being able to stop in time.