Caved In: Prehistoric Terror is a 2006 "Sci-Fi Original" motion picture, created by the Sci-Fi channel. It follows a party of tourists who become trapped underground by a cave-in, and who are then killed one by one by giant prehistoric rhinoceros beetles.
The movie is infamous for its not-so-subtle "kill lines". These kill lines are lines said by actors right before they are killed, essentially telling the viewer how they will be killed; e.g. right before getting one's head sliced open, one would say: "Argh, I have a splitting headache!" The film is one of many Sci-Fi originals that focuses on being trapped in a confined area while being hunted by mutated species.
