Directed by: Peter Hyams
Starring: Tom Sizemore, Penelope Ann Miller, Linda Hunt, James Whitmore
Revealing mistake: In the scene, when the bug (actually another Kothoga monster) run out from the box that Margo has opened due to strange noises, there are visible wheels from the puppet of the bug. (00:48:40)
Revealing mistake: When the Kothoga grabs the one SWAT member and starts to rip his head off, it's obvious that the guy is really CGI.
Continuity mistake: In the end when the Kothoga is on fire and chasing Margo, it catches up to her in moments. However, everytime it dramatically changes angles, the Kothoga appears a lot futher away than it was previously, but soon after catching up once again. Noting her progress in the room, this situation is not simply replaying the same scene from different angles. Plus when she gets to the water tank, she has plenty of time to spare to hit a lever, climb the device, and jump in before the Kothoga looms overhead.
Question: Why didn't the Kothoga kill the German Shepherd dog in the sewers? It killed the other one, but spares this one, despite killing its handler.
Answer: The beast needed human brain cells to survive, not animal cells, it ignored the dog because it wasn't important. After it killed the first one, it knew his canine brain cells would not work.
Answer: It's possible that the human side of the Kothoga, John Whitney emerged and seeing that the dog was afraid decided to let it live feeling pity for it.
Answer: More then likely, the dog was too afraid of the Kothoga to attack it and when the Kothoga saw this, it let the dog live. The other dog was probably unafraid and tried to attack the Kothoga which prompted it to kill the dog; not out of self-defense, but, because there were still people trapped in the museum and the dog was impeding his attack.