Dan Mazer, the director, was worried about the two main characters, Rose Byrne and Rafe Spall, because when they met they bonded and had great chemistry. But in the movie, the two aren't supposed to.
Danny: I think if I was going to have any super power it would be the ability to speak Spanish. That would be amazing wouldn't it? 'Cause you could say stuff like "Hola", "Gazpacho".
Nat: We have an incredible sex life, but that's not the point. I love the Michael Jackson "Off the Wall" album, but I wouldn't necessarily want to only listen to that the rest of my life.