Suddenly a flash of fur, a low growl, and a leopard sprung across our path, leaping atop a hulking solitary boulder.

BBC: The Serengeti in the off-season

Most Americans are more concerned about the games on their iPhone, the NFL labor strike, and assorted other bread and circuses, than the very real prospect that our 235-year-long narrative of increasing dominance could be suddenly over in a flash should we default or come close to defaulting on our debt.

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The conversation was over in a flash, but I suddenly felt quite different about Al Gore.

WSJ: Excerpt: From the Letters of George H.W. Bush

"Suddenly, we saw in the distance a strong and intense flash of white light, which followed a descending and vertical trajectory and which broke up in six seconds, " the captain wrote.

CNN: Brazilian air force says debris was not from Air France crash

Buxom and saucy, Ms. Borger leaves you in no doubt of her determination to get whatever's going until the last line of the song, when she suddenly averts her eyes from the audience, betraying in a flash her long-buried self-doubt.

WSJ: A Little Night Music | Writers' Theatre | A 'Night' to Remember | Theater Review by Terry Teachout

Suddenly, AB de Villiers watched at one end as everybody from number five onwards came and went in a flash with Mitchell Johnson (3-58) cutting a swathe through the lower order.

BBC: Australia end series on high note

They tackled problems like "flash crowds" (which can overwhelm computers storing a Web page or videoclip that suddenly is popular around the world) and the "fat file paradox": Why does data traveling at the speed of light often take such a long time to make it across the country?

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The show centers around flash mobs, the phenomenon when a bunch of seemingly random people in a public place suddenly start putting on a coordinated dance show. (For an example see a clip from Modern Family at the bottom of this post.) Fox will premier the show as a special on March 31st after American Idol.

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