Velocity Alert: Jay Leno's Emotional 'Tonight Show' Farewell Speech Will Make You Teary

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THIS STORY IS ABOUT TO GO VIRAL

Jay Leno's Emotional 'Tonight Show' Farewell Speech Will Make You Teary Jay Leno ended his long stint as Tonight Show host on Thursday the same way he began it in May 1992: with Billy Crystal as a guest. But what stood out the most during the celebrity-studded finale episode was Leno's heartfelt goodbye speech. "Boy, this is the hard part," said Leno, fighting back tears. "I want to thank you the audience. How does Mashable know what's going viral? Mashable built a system called Velocity, which scours the social web, collecting lots and lots of data around how people are engaging with published articles. It then pulls all of that data back to Mashable, dumps it into our own predictive engine, and predicts which articles are about to go viral. Read more at Mashable.com ▶ Mashable, Inc. is a Delaware Corporation. P.O. Box 64 New York, NY, 10159-0064

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