QF1Y: Mechanics Question Lead/Trail

[Rich]

As the trail, do nothing with the whistle unless your partner misses it going out of bounds and there's a delay without a whistle.

A subtle thing you can do if you are absolutely sure the ball was not deflected is to start walking the other way. Your partner, if he has any doubt, will pick up on that. Same thing -- take a step or two up towards the baseline if you are absolutely sure it was deflected and your "staying here."