a movie where a girl is following the orders of a deformed person on the internet and she dressed up as a teacher's dead baby for Halloween that was strangled by the umbilical cord and later she is locked by her father in the basement and she is encouraged to hit her arm with a hammer

The Loved Ones

2010 6.7

When Brent turns down his classmate Lola's invitation to the prom, she concocts a wildly violent plan for revenge.