Corrected entry: If Kevin Costner's character has gills, and can breathe under water, why would he have a device for someone else to breathe underwater? He very states that he is a loner, and does not travel any way but alone. I can see building one after he picks up his extra passengers, but beforehand doesn't make since.
Lummie
7th Jul 2006
Waterworld (1995)
Correction: Before he gets to the metal island he is seen using the same bubble as a basket to put his treasure in. He might have been smart enough to know to turn it over.
Correction: Not understanding a character's motivations or reasons is not a mistake. While he might have not needed there are numerous reasons why he might have kept it and there is no mistake in keeping it just because he might not need it.
Lummie ★