As Sarah leaves the motel room bathroom, her pistol is uncocked. When she spins round to confront Mark, the pistol is cocked. When Mark disarms Sarah and points the pistol back at her, it's uncocked again.
Felix insults Cosima's sweater, at one point calling it a "jumper." In his dialect, a jumper is a pullover; this is a button-up, what he would call a cardigan.