Louisa: Would you rather be able to fly or turn invisible?
Jack: Both
Louisa: You have to choose
Jack: Then neither
Louisa: What, you're too good for just one superpower?
Jack: What's the point of being able to fly if everyone can see me? It'd be ten minutes, tops, before I got declared a danger to national security and shot down by anti-aircraft guns.
Louisa: Okay, then forget about flight and just choose invisibility
Jack: That's no good either. If I can turn invisible but still have to walk everywhere, people will just keep bumping into me all the time.
Louisa: Fine, what power do you want? Totally free choice.
Jack: Selective hearing. I wanna be able to block out all the stupid things that people say to me.
Louisa: That's really lame
Jack: Yeah, but whenever people say it's lame, I'll just block them out
Louisa: Still lame
Jack: Alright, what would your power be then?
Louisa: I dunno. Maybe really good cooking skills. I always burn everything.
Jack: Cool. We could be a superhero tag team.
Louisa: Not much of a tag team. Somewhere there's a deaf chef who's got as much power as the two of us combined.