Continuity mistake: When Fry is sitting by the giant bones, Johns approaches her drinking from a bottle and offers her a drink. When she takes the bottle, it has the cap on.
Jack: Where the hell can I get eyes like that?
Riddick: Gotta kill a few people.
Jack: 'Kay, I can do it.
Riddick: Then you got to get sent to a slam, where they tell you you'll never see daylight again. You dig up a doctor, and you pay him 20 menthol Kools to do a surgical shine job on your eyeballs.
Jack: So you can see who's sneaking up on you in the dark?