When Pixar's "Inside Out" hit theaters, it took audiences on an emotional ride and even delivered one surprise character that nobody saw coming: Bing Bong (Richard Kind), the imaginary friend living inside Riley's (Kaitlyn Dias) head.

With "Inside Out" arriving on Blu-ray, DVD and Digital HD, the cast and crew behind "Inside Out" are finally getting the chance to speak about not only Bing Bong, but their own imaginary friends from years past.

Unfortunately for the majority of them, except for 16-year-old Dias, those memories have long been forgotten -- if they ever existed at all.

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"I had so many I couldn't keep track of them all," she tells Zap2it. "All over the place. I had a coyote who could talk and would often accompany me on car rides. That's one of the few of them I can remember."

As for why it's so hard to recall those early memories and imaginary friends, Kind has a theory.

"Your personality -- your being -- is formed within the first five years of your life and yet, how much do you remember of the first four years of your life?" he wonders. "Very little. Why did God do that? Why did that happen?"

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"[Bing Bong is] the representation of what we lost and yet that's who we are," he says.

As for his own children, both Kind's son and daughter claim to have had imaginary friends. While he believes his daughter's story, he can't say as much for her brother.

"After 'Inside Out' came out, my son claims to have an imaginary friend," he says. "He's a liar. I'm kidding. I'm not kidding."

"Inside Out" is available on Blu-ray, DVD and Digital HD, along with the animated short "Riley's First Date?"

Posted by:Chris E. Hayner

Chris E. Hayner is equal parts nerd, crazy person and coffee. He watches too much TV, knows more about pro wrestling than you do and remembers every single show from the TGIF lineup. You may have seen him as a pro-shark protester in "Sharknado 3." His eventual memoir will be called "You're Wrong, Here's Why..." TV words to live by: "I'm a firm believer that sometimes it's right to do the wrong thing."