Samantha Mathis plays Terry Carmichael, the love interest of Christian Slater's character Riley Hale. She also played the love interest of Slater's character in the movie Pump Up the Volume (1990). They also voiced characters that were "romantically involved" in the movie FernGully: The Last Rainforest (1992).
The review of this movie on 'Siskel and Ebert' represents the only time in history where Ebert convinced Siskel to change his mind about his final judgment of a film. Siskel originally gave this movie thumbs-up, but after Ebert gave the movie thumbs-down and explained his reasoning, Siskel decided to change his judgment to thumbs-down. Siskel, on the other hand, had never successfully convinced Ebert to change his mind about a movie during an episode of their show, although Ebert had occasionally changed his own mind in print reviews.
When the bomb goes off underground, the ground above it subsides into a crater, but no shock wave radiates from the site. However, we then see a shock wave breaking up the surface some distance away.
When the fake Park Ranger first appears at the campsite the sun is setting in the sky but when the camera pans to the camper and back to the fake Park Ranger it's completely dark out.