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             If you're on your Best Behavior, you'll notice "That's 
              it" doesn't work so well here! 
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             A verbal tool such as, "That's it," 
              can be used ... 
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                    to point something out, ("That's 
                    it,") 
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                    to indicate wry truth, ("That's 
                    it,") 
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                    to absorb throwaway lines, ("That's 
                    it,") 
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                    to signal completion, ("That's 
                    it,") 
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                    to assert boundaries, ("That's 
                    it,") 
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                    to reflect death, ("That's 
                    it,") 
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                    to register impatience, ("That's 
                    it!") 
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                    to acknowledge correctness, ("That's 
                    it,") 
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                    to appreciate narration of signs, ("That's 
                    it!") 
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                    to affirm success, ("That's 
                    it!") 
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                    to confirm, "Really?" ("That's 
                    it,") 
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                    to allow departure, "I'll let you go." 
                    ("That's it!") 
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                    to tell the puppy, "No more treats!" ("That's 
                    it!") 
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                    to scream after a soccer goal, ("THAT'S 
                    IT!") 
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                    and to slow down an Okay! Monster .... 
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             It is so logical. 
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