Sphere

Samuel L. Jackson would work on this film during the week, and then work on Jackie Brown (1997) on the weekends.

Harry tells Norman and Beth that they may not be far enough away from the explosion and that they may get sucked back in, even if they aren't destroyed by the shockwave. Massive underwater explosions do not cause a suction effect, rather, the water that has been displaced rushes in to fill the void, and it will rebound numerous times. Each rebound loses roughly 60% of it's energy, but will create multiple shockwaves. This is why underwater detonations are significantly more devastating than airburst explosions.

The opening credits are cast over an invisible sphere.

SPOILER ALERT: An alternate television edit has been shown with a simplified and more ambiguous ending that follows the shooting script; Harry warns them that the authorities are on their way to debrief them, and they will demand answers. The three survivors ready themselves to forget about their mission and the power they possess. Outside, a helicopter sets down. Subsequently, we see the three survivors being interviewed in a debriefing room after decompression, each shot individually against the same background. They react as if they're oblivious to anything going wrong in the Habitat, unaware of anything that happened to Ted, Barnes or the Sphere. The helicopter leaves, and the camera pans down to the ocean, where the Sphere supposedly still remains.