That's an goose bumping story, can't imagine driving alone at night. I heard a similar story once, but it happened during the day time. This one young Hmong lady back in the late 80's had a single piece of a furry skin from one of those creature that was killed by some of her relative back in Laos hanging on her necklace, it was said that if you wear piece of those creature's body part on you than they'll be afraid of you when they see it on you because they'll think that you have super ability to exterminate them and they'll leave you alone.
Well, on a sunny evening the Hmong lady was sitting in her car parked in front of her kids' elementary school listening to Hmong music waiting for the bell to ring. While she's minding her own and just singing along with Luj Yaj, a rock hit her at the right side back of her head really hard. She turn around immediately to see who did it and to her astonish, all the windows' where up. There was noway a rock could hit her that hard in such a compact space, she was confuse but not yet frighten. The young Hmong lady just rub it off, but as soon as she turn around a rock flew very fast pass her face and hit the top of the wind shed and crack it. The rock bounce and fell in between her leg, she picked it up and looked at it wondering how and where it came from. Just than school let out and all the kids ran screaming everywhere all over the school yard, her first grade daughter got to the car first. As soon as she open the back door she pause and looked in like something or someone was behind the car, "who's that mom?" she asked. The young Hmong lady got the goose all of a sudden and burst out of her car, grab her daughter and wen inside to call her husband.
That night, she had a dream. The thing came to her and said "you think that just because you wear one of our people's piece of meat on you that we'll be scare, don't even dream". The next morning she woke up and her husband saw a little red hand print on her left cheek like a baby smack her really hard. The kids didn't go to school that day, they called all the relatives for an emergency supernatural ritual. They've found out that the creatures wanted the piece of skin return to them by burning it and most importantly wearing a piece of skin of those thing don't work, it'll only get you in trouble.