We don't know what these animals are laughing at, but what we do know is these laughing animals are adorable.
Source: Tastefully Offensive
This video tells the story of two baby otters, Molalla and Zigzag, and how they learned to swim from their mother, Tilly. Young Ziggy was a little behind compared to Molalla, but now that he's caught up, he loves to swim away from his mother.
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I'm not sure if that man should feel lucky or terrified that he is in the middle of a furious, squeedorable, wolf cuddle puddle...