There's this Ryan Gosling quote that I steal all the time - I watched an interview with him in Cannes - and he said picking roles is like listening to songs on the radio: There can be a lot of really great songs in a row, but then one comes on that just makes you want to dance.
I have a nervous breakdown in the film and in one scene I get to stand at the top of the stairs waving an empty sherry bottle which is, of course, a typical scene from my daily life, so isn't much of a stretch.