Hack Job

After Jack and his girlfriend Macy have sex, he falls sleep. When he wakes up, Macy is gone. He finds blood all over his house and a severed arm in his closet. He is then attacked by a person in a mask, who is revealed to be Macy, who was pranking Jack. However, an actual killer wearing a Gunny sack beheads Jack with an axe. He chases Macy, but she manages to hide. She then watches in horror as he places Jack's corpse in a body bag. She accidentally makes a sound, and the killer chases her down and dismemberment her before placing her remains in another body bag.