| 21. | The walker will often double back and cover ground already covered.
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| 22. | He heads off, then doubles back to follow Von Bruning and his men.
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| 23. | He brings the double back to the base and tends to his injuries.
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| 24. | Witt said Darling told him he went past May's driveway then doubled back.
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| 25. | They shift and change and grow and double back and grow some more.
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| 26. | The road then doubled back in the opposite direction from Chechnya.
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| 27. | On high bar, the Tsukahara is a full-twisting, double back somersault.
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| 28. | Bhavsar executed a high, double back flip on the vault and stuck the landing.
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| 29. | "They can double back where a car can't double back.
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| 30. | The buses then doubled back, reaching Dagestan after nine hours on winding steppe backroads.
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