The discussion explores the possibilities and impossibilities of concepts presented in science fiction movies. Participants are encouraged to share their thoughts on various elements, such as the car navigating a tunnel in "Men in Black" and the floating mountains in "Avatar." The conversation suggests that while some ideas may seem far-fetched, they can spark interesting debates about science and technology. Suggestions are made to continue the discussion in more appropriate forums, like general or skepticism. Overall, the thread aims to engage fans in analyzing and imagining the scientific implications of popular sci-fi films.