A guy wants to steal something from a museum or gallery at night, either a jewel or other pricey artifact (cant remember what it was exactly), but the room in the museum that holds the display case for the item is secured with laser beam security, or at least light beams (i cant remember which) that will go off if he breaks any beam. So he uses grappling hooks to go around the ceiling perimeter above and around the light or lazer beams, and gets above the case that holds the object to steal, and steals it. seen in early 80s. either in theater or on hbo then.