What parts made you cry?
Let me start by saying that, as many people have already pointed out, this is an extremely difficult movie to watch. I didn't cry as much as I expected I would, and I'm sort of surprised that the part that *did* make me cry wasn't really even directly connected to Vivian's cancer...
It's when she is remembering the first time she ever read a book, "The Tale of the Floppsy Bunnies." I loved how in the movie they would go back and forth between Vivian as a little girl at home, then grown Vivian struggling over the words, then showing her father in the hospital... all such incredible visuals you can't achieve on stage. Anyway I think the crying began for me when you see a tear roll down the adult Vivian's cheek as she remembers this simple memory, and her late father.
"They're sleeping, like you said! Soporific!"