I can speak from personal experience with the Coach. His method was to wait until the last second to decide on plays like that one.
You'd be chugging to third, and as you took your round of 3rd, he'd be about 1/3 of the way down the line toward home either flailing away or waving a pair of red flags screaming "THE BRIDGE IS OUT!" Ahnuld style.
Never any unsure signals.
Of course, the flailing backpedal sending people home can lead toward disaster for the basecoach too... Maybe if you ask nice, he'll tell you the story.
you, sir, do dastardly deeds at times. how can i not tell it now?
we were playing Boerne at Wolff Stadium in SA in a third round playoff game. the score was 0-0, the game was tense and we finally had a chance to score. the ball was in the OF, and my runner was nearing third. we worked on this in practice, and he did not slow down rounding third. i backpedaled down the line, waving him on as i was deciding what to do. just about the time i threw up the stop sign, i backpedaled into a sprinkler head depression and fell. Backwards. Hard. On my butt. i did a backwards roll with my feet hurtling over my head, my glasses went flying, and i wound up on my stomach facing my bemused runner who had stopped and returned to the bag to watch the catastophe unfold. i climbed to my feet hoping that no one had been filming that play. my "concerned" players had, as one, collapsed in laughter on the bench. leading the hilarity was none other than the 1B, Mark Raup. it was quite a Kodak moment, and the Boerne crowd gave Mark hell about me for the rest of the game.
this pratfall is mentioned in the last Dugout article i wrote. oh, we won the game 3-0.