Benedict Cumberbatch and Jimmy go head-to-head taking turns watching funny Internet videos and trying not to laugh.

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The Tonight Show Starring Jimmy Fallon features hilarious highlights from the show including: comedy sketches, music parodies, celebrity interviews, ridiculous games, and, of course, Jimmy's Thank You Notes and hashtags! You'll also find behind the scenes videos and other great web exclusives.

Try Not to Laugh Challenge with Benedict Cumberbatch
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