Continuity mistake: Throughout the entire movie the size of the Event Horizon's interior versus that of its exterior is repeatedly off. Evidence of this is seen mostly with scenes that take place in the main access corridor. First off, it is made to seem that the ship has one central connecting tube, but in the exterior shots there are several tubes that make up the middle of the ship. This is pointed out when Miller is making his way across the ship to get to the air lock that Justin is about to open. Second, the length of the tube (heck even the whole ship) is too small in relation to how the ship appears from the outside. This is pointed out in a few different places in the movie - when the crew is up on bridge, then race all the way to the airlock in the middle of the main access corridor, where Justin has just closed the inner door and when the doctor is asked to go grab his med kit from medical, which is across the ship and he is gone only a few seconds, and also when Miller is running though the corridor to activate the explosive charges. Since the ship has no faster means of transportation, such as turbolifts or a tram system, they could not be covering the distance they appear to be covering in the movie.
Factual error: When D.J. is attacked by Dr. Weir, he is grabbed by the throat and is squeezed until his windpipe is broken, shown by the way he was breathing (or struggling to). When Weir seizes him again and throws him against a support beam, he screams in a way impossible for someone who just had his windpipe crushed.
Plot hole: In the scene where Lewis and Clark nearly hit the Event Horizon, One of the crew is calling out the closing distance and another confirms this information. Regardless of clouds obscuring their view they were aware of their proximity and the fact that they were speeding towards it and forced to attempt an abrupt stop makes no sense.
Trivia: Pneumatic palm sanders were used as hatch door switches for the gravity drive room and the access-way leading to it. Do a Google image search for "Pneumatic Palm Sander" to see examples of the tool. It's a vintage or classic style that's used in the film. (00:26:45)
Dr. Weir: What was made public about the Event Horizon - that she was a deep space research vessel, that her reactor went critical, and that the ship blew up - none of that is true. The Event Horizon is the culmination of a secret government project to create a spacecraft capable of faster-than-light flight.
Smith: Uhm, excuse me. See, you can't actually do that.
Question: 1) In the big finale where the gateway was opened: was the ship destroyed before it went through the wormhole or did it blow up as it was going through - trapping everyone in Hell? 2) In the final scene just before the gateway is opened, there is an argument going about whether Miller's crew are alive or dead and talk about them belonging to the ship. We saw the crew die, so I fail to understand the mental imagery of their suffering Miller was shown. Also, if the crew belong to the ship to replace her old crew - why haven't we seen anything of the old crew?Rosie John