Whats going on with the gravity there I wonder.
Additionally, how does gravity plating work [isn't that how they create artfiical gravity in Trek] in such large open spaces?
Wasn't gravity plating first mentioned in Enterprise? Even there you had a neutral spot on the ship, so it probably works in a way different from what you would imagine when you say "gravity plating". Besides, it could have been the artificial gravity of another ship that was pulling them down when theirs went off.
Either way, I don't care how it works, it is amazingly cool and it makes sense for it to do that in space. It makes the whole concept of artificial gravity feel more real to me. Neat idea. Good job.