In days of yore, a good friend of mine sold pirated VHS movies at school. As a 15-year-old it didn't matter that the image was black & white and that the only thing I could really see was the Chinese subtitles; what mattered was that I got to watch a film a week before it was released at the theatres.
A few things will happen while watching Gravity. Your palms will become sweaty, then they may seek comfort at the sides of your face. You'll feel isolated, alone. Little wonder your breathing will become shallow. With your body empathising with the characters, this is clearly not the sort of film you can ignore.