This is really annoying, but it's true. You're going to be ecstatic and sleep deprived, barely able to stand in the front of the theater during your first Q&A, beaming at having gotten there in the first place, ready to hear what people have to say about your movie, baffled at the fact that you are even awake, ears ringing from stress-induced tinnitus. Some asshole is going to ask you what you are working on next. Have something to say. It doesn't really matter if it happens or not, the fact that you have given it any thought and can have a confident answer will make that guy shut up. Hopefully what you are saying is true, which will make it all the sweeter, but make sure you have something to say.