| 11. | Somehow, Sandoval is able to keep a straight face, which makes it even funnier.
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| 12. | Trying to keep a straight face posed a constant problem.
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| 13. | I can't understand how he could keep a straight face.
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| 14. | He keeps a straight face, something no one watching will be able to do.
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| 15. | It's hard for me to keep a straight face when they come in here.
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| 16. | Most of the people in the room are trying to keep a straight face.
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| 17. | Haynes and others sometimes failed to keep a straight face and occasionally burst into laughter.
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| 18. | The woman, trying to keep a straight face, nodded.
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| 19. | Dripping, bedraggled, shivering, she can hardly keep a straight face as another bucketful hits them.
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| 20. | Costner keeps a straight face through it all, though that probably wasn't the smartest approach.
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