OK - here's my serious answer. Just stop, put up your hand like a stop sign and tell him (or her) "That's enough coach". That generally worked for me.
OK - here's my typical answer. "I'll tell you what coach - let's trade places. You come out here and call the game and I'll sit on the bench and act like a jackass." That generally works, also.
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Yom HaShoah
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