Stanton sticks a flat blade into the door lock, jiggles it a little and poof, the door is unlocked. Picking a lock requires two tools, one is a flat blade used to apply twisting pressure on the barrel while the pick moves the tumblers up and down until each one is positioned in its unlocked position. In this way each tumbler is released . It is NOT possible to pick a lock with a lone flat blade or a hairpin either as depicted in so many shows.
When Joe gets up and leaves the audition he jumps up on the stage, landing on a light bulb, shattering it and causing another down the light strip to break as well. Yet, there is no sound of breaking glass.
When the murder victim's body is revealed, her mouth clearly moves.