Baghead

Four "actors" go to a cabin in the woods for the weekend to write a movie script. They talk about a relationship movie or a paper bag over the head movie. It starts with an anonymous baghead and slowly escalates.

Baghead is a 2008 drama horror movie, starring Greta Gerwig, Steve Zissis, Elise Muller. It holds an IMDb rating of 6.0/10 from 5,881 votes and runs 1h 24m.