They approach, embrace, and poof! they disappear in a blinding flash of light.

他们走近、拥抱，然后，噗--他们就在一道炫目的光亮中消失了。

《柯林斯英汉双解大词典》

Organizing a "flash mob" basically involves e-mailing a bunch of people with instructions to show up at a certain place for a few moments, then disappear.

组织一次“快闪”活动，基本上只需要用电子邮件通知一群人在某个地点出现一会儿，然后消失。

youdao

Whatever exists, exists (though even this sentence is impossible) once, and without so much as a flash, will soon disappear among patches of black or ruddy clouds.

无论存在什么，只存在(尽管连这个由句子也是不可能的)一次，而且没有这么多的闪光灯，很快就会消失在一片片黑色或红色的云中。

youdao

The uDrove Humanitarian Bowl: Northern Illinois will take on Fresno State in the battle of a bowl sponsored by a mobile phone app that makes truck-driving paperwork disappear in a flash.

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