The House Bunny star spends weeks collecting tiny pieces for her dioramas and then conjures up grisly death re-enactments.
Faris explains, "I've been working on this bear attack scene, like a camping site sort of deal... I've got a little barbecue and I've got one of those little miniature tents and I've got little sleeping bags."
But she admits her weird hobby is a very lonely one: "Nobody likes to play with me... I sit there by myself and stare at it for hours."
The actress believes her obsession with crime scenes started at a young age.
She explains, "When I was eight, I wore gloves for, like, four months straight because I was convinced I was gonna get framed for murder."