Should I or will I just get angry??
Well there are a few things that might trouble you. But remember it's science fiction!
First of all, and this is a common problem....they take a small shuttle down to the surface of a sizeable planet and later leave in it and zip back out to the orbiting main ship. There is no "secret energy source" for thrust....no dilithium crystals. Escape velocity?
Secondly...the whole point of the future beings contacting today-Earth is to give them knowledge on how they can use "reverse gravity" to lift a huge city-sized ship into space. Aside from some stuff I've read about some sort of "opposite force" being responsible for inflation....are they suggesting reverse warping space-time?
But again, the beings are from way out in the future....so maybe....
But it is a great movie....aside from extreme....and I mean extreme fluctuations in the sound mix. It goes from whispered dialogue to house shaking explosions faster than you can man the volume control button. But that is an ongoing gripe of mine....I have a kind neighbour....I don't want to blow him out of his chair.