[YouTube - Link]
This American Life, the well known show on NPR, had its television debut a couple years ago. This animation is from their second season and reveals an extreme example of how memories can shape themselves through something called the "misinformation effect."
In truth, memories are reconstructed each time we recall them which can lead to one telling a small lie in a memory and eventually believing that lie to be true further down the road.
http://youarenotsosmart.com/2010/06/03/misinformation-effect/ via Doobybrain