Because everything was shot against a green screen, some bits of colour proved difficult. Yellow Bastard especially was hard, as yellow bleeds into the green screen and can't be separated cleanly. To get around this, Robert Rodriguez painted him blue, then turned him yellow in post production.

The priest Marv speaks to is Frank Miller, the creator of Sin City and co-director.

Miho's swords are the same ones carried by the Crazy 88's in Kill Bill vol.1. The prop designers asked Tarantino if they could borrow them and he let them.

Quentin Tarantino directed a scene with Clive Owen and Benicio Del Toro in a car. He was paid $1.

When Hartigan picks up the book of matches for the bar that Nancy works in, it is the cover to the Sin City Trade "Booze, Broads & Bullets."

When Hartigan re-steals the Ferrari from the hotel he and Nancy were at, there are three guns. One is an absolutely huge hand cannon with heat absorbers and the works. That gun is actually Robocop's gun - co-director Frank Miller wrote Robocop 2 and 3.

There is a bit of Frank Miller trivia hidden on screen during the segment when Jackie Boy and his soldiers enter the apartment of Brittany Murphy. On the t-shirt of the soldier (the one Shellie threatens with the knife), there is a symbol of a peace sign in a circle with a star on the left and stripes on the right. That is the symbol for the P.A.X. forces from Frank Miller's comic about Martha Washington, such as in "Give Me Liberty".