During The CSI Movie, GRAVE DANGER, you will see a delivery boy being interrogated as to where he picked up the "evil" package. He gives a bogus address, and when they go to the house address given, you will see a poster on the wall in the background by the door. It's a poster for the movie, "Cabin Fever". Now, the significance of this poster is one of the actresses of Cabin Fever, Cerina Vincent(Marcy), guest appeared during the fifth season in episode 5.19("4X4"), as "Suzy Underwood". Just a nice little nod/thank you to her for appearing on the show.