Continuity mistake: The two associates sit Eddie on the bench at the bus stop; the mess all over Joe Mantegna's hair (in particular the green goo on his forehead) changes between shots. (00:29:35)
Continuity mistake: The three guys look at the bus leave; Norby is biting his fingers and Veeko has initially his hand on Eddie's shoulder but (same shot) lowers it. Cut to the bus steering, and now Norby has both hands on his thighs and Veeko's hand is back on Eddie's shoulder. While technically they could have time to move their arms like that, they are meant to be "frozen" in shock in the same position and there's no logic in the change. (00:29:45)
Revealing mistake: In pursuit of the bus, Eddie is turning the van to the left from the main street into an alley. Two different takes have been edited together, as the position of the cars behind and in front of the van changes (not dramatically though, the coordination in the scene has actually been better than much easier scenes). Also you can see on the asphalt obvious skidmarks from previous takes. (00:30:45)
Continuity mistake: Look behind Norby when he pries open the bus doors; a woman with a teal pantsuit is not exactly inconspicuous as she strolls along the sidewalk. A few cuts after (when he says "A little guy, about two feet tall") the same extra is recycled, walking in the exact same direction. (00:31:50)
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: The first time we see Bink crawling out of the big lady's bag, in frame you can see Veeko's legs, feet up, but he has not been knocked out yet. (00:33:40)
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: 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: In the overhead shot of the baby in the middle of the road in front of the zoo, the road is lit evenly, while in the shot just before you could see half a lane being in full sunlight. (00:42:55)
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: The three kidnappers run after the baby who got into the zoo; they jump over the shrub between two benches, but the leftmost bench is occupied by a lady who disappears between shots. (00:44:20)
Revealing mistake: At the beginning of the three scoundrels' efforts to retrieve the baby from the cage, Brian Haley manages to lean into the cage so deeply he's in with the whole waist, with enough room for Joe Pantoliano to reach around and helping, even. The setup is so absurd that it is scrapped in the rest of the scene, and Veeko can lean in for a much smaller portion of his body (and still can reach the baby just fine). (00:47:35)
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)
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: 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: 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)
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)
Continuity mistake: Baby Bink spots a donut left on the girder by the construction worker. The donut turns around (going by the bitten part) and moves (going by the way it sits on the napkin and how much of it is on one side or the other) between shots, repeatedly. (01:08:30 - 01:09:15)
Other mistake: The girder is being already lifted when Veeko finds him; he has still to talk to his buddies outside, and they need to get into the construction site, look at him. Before they go to the elevator and take it, more than a minute has elapsed but the girder has gone up just a handful of storeys. (01:09:20 - 01:10:15)
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.