Following is a transcript of the video. Narrator: If you peel back the layers of Rapunzel's hair in "Tangled," you'll see just how complicated animating 3D hair can be. But back then, Disney had ...

The tot had a history of eating her own hair. The rare condition is known as trichophagia - also known as Rapunzel syndrome. While Rapunzel is known for her long, flowing locks, this syndrome is ...