I saw this movie in the early 80's. I'm not sure if it was made in the 70's or 80's but there were 3 kids, 2 girls and a boy. While 1 sister was sleeping, the other 2 sibilings tied her shoe strings in a knot. The family was driving in a car and hit a big rig head on. The car caught fire and the sister with the tied shoe laces couldn't get loose and she died in the fire while her familt watched helplessly. She came back and haunted, and killed off the family 1 by 1. I can't remember the name of this movie but my little sister and I remember it like we saw it yesterday. PLEASE... If you know it, let me know. Thank you so much in advance.