Last night, BLACK SWAN's Natalie Portman graced the couch of the Late Show With David Letterman -- and if you missed it, you're in luck: we have the whole thing after the jump.

Now we know why that physical therapy scene in the movie was for real--ouch. We're not sure what a "displaced rib" feels like, but we're pretty confident that we never want to find out.

Here's the full interview, for your viewing pleasure: