I've learnt a lot about certain things but you also learn through your own experience.

It was a lot of fun to play a character [in Swiss Army Man] with no inhibitions, and with no knowledge of the world, and who comes into the world kind of like a blank slate. It means there's no template or blueprint for how you need to play certain scenes.

It's almost a problem how much I enjoy my work.

Everyone on the set has a mobile phone, and I found by pushing a few buttons, they could be programmed into different languages. I fixed Robbie's Coltrane to speak in Turkish.

The best thing I've learned is, if you're going out, never go out alone - you leave yourself vulnerable. If you've got someone else there you trust, they can say, be wary of that person. I probably used to be too trusting of people.

People tell me I look mournful. They say, "Cheer up, Dan, it's not that bad!" Sometimes, I just look into space, which freaks people out. If I was ever required to do anything other than look haunted, I could. I'm a happy person.

In my experience of doing physical scenes, half of your energy is spent on trying to get the other actor to enter into it physically with you. Most actors don't want to hurt each other.