One story told on the Navajo reservation in Arizona concerns a woman who delivered newspapers in the early morning hours. She claims that, during her rounds, she heard a scratching on the passenger door of her vehicle. Her baby was in the car seat next to her. The door flung open and she saw the horrifying form of a creature she described as half-man, half-beast, with glowing red eyes and a gnarly arm that was reaching for her child. She fought it off, managed to pull the door closed, then pounded the gas pedal and sped off. To her horror, she says, the creature ran along with the car and continued to try to open the door. It stayed with her until she screeched up to an all-night convenience store. She ran inside, screaming and hysterical, but when the store employee dashed outside, the being had vanished. Outsiders may view the story skeptically, and any number of alternative explanations might be suggested, but it is taken seriously on the Navajo reservation.
A slightly different version of this story, and the only one I found from this perspective, comes from Ghost Studies.com: