Maura shows Jane a bump key and tells her it is a very sophisticated lock picking technique. In reality bump keys are very crude brute force devices requiring no skill to use and are the very antithesis of sophisticated lock picking.
When Boris opens the fridge to make dinner, there is no light on inside.
When Jane is finished printing files in the squad room, the printer says OUT OF PAPER, but there is a pile of paper in the feed tray.