Re: Tropic Thunder Grading and Discussion - Spoilers.
I have to say that I don't think the fake previews would have been as effective had I seen the movie normally. There were no regular previews in the screening but I think most in the theater were expecting them. So when that ad for the ass drink popped up everyone burst out laughing and was like, "wtf? Is this real?" It was honestly pretty hard to tell! It wasn't until the next fake preview that we realized it was part of the movie.
Time present and time past
are both perhaps present in time future.
And time future contained in time past.