This is an experimental FAN-MADE video! I can not guarantee a good work.... But i tried to make it fun to watch..
I'll try to explain it(like somepony cares). The whole video is based on a single Bioshock trailer. The first part of the video is about twilight falling into Rapture/Ponyville and discovers something bad. The second part is my bad attempt to make Twilights world(Equestria, Ponyville, her friends etc.) being sucked into world of Bioshock.
Applebloom is a Little sister :D
P.S. Some nice artworks are in the video. I forgot to credit them(found em on devianart)