Instant Index: Pod of Dolphins Interrupts a Surfing Competition to Catch Some Waves

Diane Sawyer reveals the stories people have been buzzing about all week.
3:00 | 01/20/14

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Transcript for Instant Index: Pod of Dolphins Interrupts a Surfing Competition to Catch Some Waves
Time for the "Instant index," what we're all sharing today. And it begins with a surprise guest stealing the show at a big surf competition over the weekend. Here, it happened off the coast of California. Look. The athletes, hanging ten. But there closely, so is someone else. See it there? A pod of dolphins catching the waves. Getting a round of applause by the crowd. From the fans onshore. And passengers at a crowded airport in Shanghai got a surprise. A dance break. More than 60 flight attendants pulling out their Tai chi and dance moves. Nothing like a flight attendant flash mob to cheer you up in the winter. And tonight, authorities want to know if you have seen this painting. Is it hanging in your living room? A man, a woman, sipping champagne and eating oysters. It sold on Ebay eight years ago for $4,900. But turns out, it is worth 80-times that, more than $400,000. It is by French impressionist our. Someone somewhere in the world may be sitting on a fortune and not know it tonight.

This transcript has been automatically generated and may not be 100% accurate.

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