When "shall" means "must"??

[letemplay]

When "simply" means "shoulda". Agreed, that's what you would have wanted, but in case of a screw-up, like not getting those guys there or if the coach just wants to talk to one of the two guys he's wants in the spots, do you wait on him? Or, if you are the administering official and you bounce the ball to the shooter and then realize something doesn't look right...while the shots on the way and then missed, you're wracking your brain to remember what to do.