I really didn't like the part at the end where they separate, and he's traveling into Gargantua. The director forgot one thing: that Gargantua should have been fucking big. Like 10.000.000 times bigger than they actually represented it, and it's force of attraction is sensed from an unmeasurable obscene distance. But for the sake of the viewers, and to not diminish the chances of understanding the basics even more, that worked too.