The time you need the signal is not when you are signaling to the table. It is when you first blow the whistle.
Situation: player is backing into the corner, feels a sneeze coming on, turns his back, and signals a T. You on lead are the only person in the gym who sees this. You blow your whistle, and then what? Shout and hope the coach on the far bench hears you? Hope all the players with their backs to you and thinking about other things and trying to get untangled hear you?
We need a signal!
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