Visible crew/equipment: As the Batcoper emerges from its hangar, multiple crew and equipment are reflected in the cockpit's glass bubble. (00:04:05)
Visible crew/equipment: When Batman is running to get rid of the bomb, when he runs past some windows you can briefly see the camera and its stand in the reflection. (00:59:55)
Visible crew/equipment: In the final fight scene on top of the submarine you can see the ripples and shadows on the painted sky backdrop behind the submarine. (01:31:05)
Visible crew/equipment: As the Bat copter is approaching the yacht, in the frame is a crew member, either a member of the yacht's crew...or production crew. He apparently realises he is on camera and ducks down behind a railing.
Visible crew/equipment: As the Batboat preps to leave, the rotor wash of the camera chopper is visible playing across the water, and as it takes off, the blades of the chopper are visible as it tries to catch up to the boat.
Answer: The Riddler doesn't sing at all. He yells to the henchmen on board, "Prepare to repell boarders!" He does it in a almost musical way, true, but there's no song.
CCARNI ★