Still, this scene was pretty great.
A Medical Procedure
The "android going homicidal" trope is well worn, especially when it comes it movies in the Alien franchise. Watching David (played by the aforementioned Michael Fassbender) do it is still fun. In the leadup to this scene, he puts a bit of the bizarre mutagen that drives most of this movie into one of the main character's drink. Said character then proceeds to get romantic with his girlfriend, Shaw.
It's been established at this point in the movie that Shaw is infertile, so when David mentions that she's pregnant, the viewer immediately assumes the worst.
Which, as it turns out, is a pretty safe assumption.