When Marco pulls a gun on Jesse during Jesse's reconnaissance of Marco's residence, we hear the sound of the gun's hammer being thumb-cocked off-camera. However, when the camera shows the gun pointing at Jesse's head the hammer is in the uncocked position.
During the scene with Michael, Jesse, and Madeline at the Carlito, the back of Madeline's shirt collar is up in the side shots and folded down in the head-on shots.