Continuity mistake: When the mother and the nanny are rushing back to the room where the phony photographers were, the housekeeper is doing some cleaning in a part of the hall to the side of the door. The butler opens the double doors, and she is suddenly already in view, trailing behind the trio. (00:14:30)
Continuity mistake: In the close-up of the three idiot kidnappers getting their feet crushed by a passing van as they stand in the middle of the street, their order in the line is wrong. The leftmost person is wearing boots, so it's supposed to be Veeko, who is in the center in the other shots. (00:44:10)
Continuity mistake: Eddie falls from the roof and breaks his fall on a window-mounted air conditioner. In the close-up through the window, no cable can be seen behind Joe Mantegna's head (supposed to be there as he took it down with his crotch earlier), but it is there in other shots. (00:27:00)
Continuity mistake: When Brian Haley absolutely decks Joe Pantoliano with a smack to the back of the head, the delighted baby is shown in two close-ups. In the second he is not in the same spot (look at the cloth behind his head) and his hair is combed differently across the forehead. (00:17:20)
Continuity mistake: When the three stooges are about to jump from their hideout's roof, in the shot from behind Eddie has just one foot on the cloth placed on the edge of the building, while with the camera in front he has both feet on it, and Veeko's right foot fits too. (00:26:50)
Continuity mistake: Veeko sits on a bench to scream in pain after the gorilla's less than friendly actions. In the background you can see the cleaning cart with the mop placed against the brick wall. In other angles the mop is against the doorframe instead. (00:49:10)
Continuity mistake: From the kitchen table, Veeko tosses Baby Bink's storybook to Norby. He is tossing it with the back of the book on the left of the screen. When Joe Pantoliano catches a book tossed from stagehands, the book is turned the other way around. (00:20:05)
Continuity mistake: Veeko is trying to pry Baby Bink away from the gorilla cage pulling him by the shoelace. In the side view the floor of the cage is littered with half eaten fruit, but in the close-up all of that is gone. (00:47:35)
Revealing mistake: When the three criminals jump from one roof to the other to chase the baby, Norby rolls during the landing and ends up against a metal chimney, which gets pushed aside, offering no resistance whatsoever. (00:26:55)
Continuity mistake: After being tossed across the building by the gorilla, Eddie is stuck between bars with the arms being positioned differently between shots (right arm down/right arm up in the front view). (00:53:00)
Revealing mistake: In the overhead shot of Eddie flipped back by the plank decking him in the jaw, look when he lands; the modest impact makes a chimney supposedly made of bricks wobble conspicuously. (00:26:05)
Continuity mistake: Veeko screams in Norby's face when he touches the hand pounded by the gorilla; Norby has both hands in front of his mouth as reaction, but they disappear in the reverse shot. (00:48:50)
Continuity mistake: Baby Bink crawls out of the monkey building with his shoes unlaced, but they tie themselves up perfectly off-camera for the next scene. (00:56:30)
Other mistake: The big lady and Veeko himself barely fit in the space between the building and the van, which are aligned. Yet Veeko has to just turn on the left to get a good visual of the lady who is now at the other side of the van itself. (00:32:45)
Continuity mistake: When Veeko spits his fingernails in front of the TV, Joe Mantegna and Brian Haley barely keep any continuity between shots (Haley's hand is turned with the palm up or down, Mantegna's pen hand is at different heights). (00:24:00)
Continuity mistake: Picking up clothes to dress up Baby Bink for the shoot, the mom asks "Won't that look like we're trying to match his eyes?" The baby is 'reading' the book with the right page lifted, while it was flat when the sentence began. (00:06:45)
Continuity mistake: Ronnie Lee drops the microphone and the bad guys notice the baby getting in frame; they turn around twice across two shots, in the second of which Joe Mantegna has his right hand up, while he had both arms down in the first. (00:37:50)
Continuity mistake: The couple is reading newspapers at the breakfast table. When she replies to him that Old Willy hasn't had a picture in it in 20 years, the top of the newspaper is visible, but in the next shot the paper is folded. (00:04:15)
Continuity mistake: Baby Bink is making his way inside the department store after getting pushed by the revolving door. POV shots have him walk on a decorated portion of the floor, but in the side views he keeps creeping on plain tiles. (00:34:40)
Continuity mistake: In the sequence when Baby Bink crawls off bed, Joe Pantoliano is resting on pillows positioned differently depending on the camera angle (the back pillow is either slumped low or propped higher). (00:23:25)
Answer: It might have taken a while for them to find the keys to the crane as well as figuring out how to operate it. Once they did, they could get him down.