It aired on channel 4 a couple of years ago, and it was about a group of teenage girls having a sleepover/party. One of them was a complete bitch, so the "new" girl of the group slipped her some LSD, and they proceeded to pour rat's blood on her and convince her she was dead. She ended up killing herself. Does anyone know what it's called, who it's by, or where I can get a copy? All I remember is that it was a short aired fairly late.