Is it normal? creepy death dream

Is this a normal dream?

I was riding in the backseat of my mom's car, and my sister was in the passengers seat(i'm 18 years old btw). We were driving up a paved road in the woods. A man walking up the road in a black hooded robe with a large curved ax came into view. I quickly told my mom and sister not to look at his face, but my sister looked at him. After we got out of the car i told my sister to leave and go far away because i thought that guy was going to kill her, but she didn't believe me. Later that night she went outside the house to smoke, and i was looking out my glass slider door because i was worried about her, but it was so dark that i couldnt see anything. So i turned the outside light on and the man in the black hood was right behind her, before i could yell anything he grabbed her, and threw her through my glass slider door. He was kneeling on top of her and i saw his face, it looked like the static on a tv. He then bit my sister's face off and disappeared.

End of dream. Please tell me what you think of this.