I Know What You Did Last Summer Allusions

Referencing the 1997 movie of the same name, I Know What You Did Last Summer . One year after accidentally killing a man and dumping his body in the sea, four friends are forced to relive the events of the previous summer. They had thought they were in the clear, until an unknown assailant warns them "I know What You Did Last Summer."

Referencing the 1999 movie starring Winona Ryder as real-life mental patient Susanna Kaysen, who was placed in a mental institute after trying to commit suicide