Revealing mistake: When Lorrie throws the chair out the window, follow its path down. It bounces off a mat, revealing that she's about two feet off the ground. (Corrected in the BluRay release). (00:01:00)
Continuity mistake: When Doug first arrives at the Tower, he goes down an elevator from the roof to the 65th floor, then has to cross over to different elevators. In one of these, he goes up - to 79 according to the display; but the floor buttons on the control, consist of just 16 buttons; the 7th or 8th button is lit as he gets off, so he has only gone up halfway to 79. (00:06:45)
Character mistake: Just before the fire starts on the 81st floor, a man is shown telling an elderly couple that business offices only go as high as 80, and that 81-120 is exclusively residential. Not long after O'Hallorhan arrives, he asks Jernigan for a list of business tenants from 81-85, which Jernigan replies "most are yet to move in and those that have are not working at night". As said by the man earlier, these floors do not house business tenants, only residential. (00:12:05 - 00:43:45)
Revealing mistake: When the security guard attempts to open the storage room door where the fire has started he is set ablaze. Look closely and he is wearing large protective gloves over his hands. (00:38:15)
Continuity mistake: Roberts rings Duncan and tells him Will Giddings has suffered burns and there is a fire in the building. We hear the whole conversation and Duncan ends it by saying, "A fire in a storage room on 81 can't hurt us up here," but Roberts never mentioned where the fire is. (00:39:45)
Revealing mistake: When Dan Bigelow is going out to get help, at one point you can see him dipping down to get ignited. (01:04:00)
Revealing mistake: When Dan Bigelow tries to save himself and his girlfriend from certain death by racing through the flames to get help, watch as he falls to his death. The stuntman portraying him is wearing a protective glove on his right hand. (01:04:40)
Revealing mistake: After Dan Bigelow is killed, Lorrie goes back into the office to protect herself from the flames. When she is kneeling down in the office, you can see the fireproof pants on her legs. (01:05:00)
Revealing mistake: On the roof during the helicopter rescue scene, there is a panic and some women run to the helicopter trying to land in strong winds. As it explodes, a woman in a slinky dress falls down. Paul Newman helps her up and her dress is whisked up to reveal "stuntwoman" kneepads on her legs. (01:51:15)
Continuity mistake: In the shot where the 12 people are going down the scenic elevator, you can see the fire coming through the windows but then, when it widens out the shot to show the helicopter flying nearby, there are no flames whatsoever on any floor of the building. (01:57:35)
Other mistake: During the scenic elevator rescue scene, a helicopter lowers the Fire Chief down to connect a cable to the top of the elevator. The cable is seen to be hanging no more than three feet from the side of the building. If this were the case, the helicopter's rotors would be hitting the building. (02:04:10 - 02:06:10)
Continuity mistake: When the first woman goes across on the breeches buoy, the overhead shot of her going across does not show the outside elevator which at this stage is hanging by a cable and stuck on the outside. However, it is visible in the shots from the peerless building which the breeches buoy is attached to. (02:05:10)
Revealing mistake: Watch carefully as the statue falls on the bartender. It barely touches his chest and rests on his left thigh. As the bartender slumps dead you can see a wide open gap between his whole upper body and the statue. Even if it crushed his thigh it would not have killed him so quickly. When the bartender slumps down the statue rocks freely as he brushes against it; obviously a styrofoam replica.
Continuity mistake: During the scenic elevator rescue scenes, the building has moved across the downtown core and is now located next to the Transamerica Pyramid, which is many city blocks to the west.