Trivia: Many of the corridors in the Event Horizon are coffin shaped - perhaps foreshadowing the fact that it is a "death" ship?
Trivia: An "event horizon" is the gravitational boundary which encloses or encompasses a black hole, from which no light escapes whatsoever.
Trivia: The Event Horizon was designed to have features subtly reminiscent of the famous Notre-Dame Cathedral.
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)
Trivia: Early on in the movie, there is a shot of the space station above the Earth, which pulls back further and further to show the full structure. Although this shot lasts for just 45 seconds, it took 10 weeks to achieve and used almost a third of the special effects budget, around $12m.
Answer: As a representative of Hell, Dr. Weir was torturing Captain Miller with all sorts of horrific mental images. Miller cared very much for his crew, so Weir fabricated hellish visions of his crew. And the aft section of the ship didn't blow up, it was sucked into the Hell dimension.
Charles Austin Miller