I got into shape because I took kick-boxing lessons every day to prepare for a fight scene with Taylor Lautner. I really wanted to lie down and eat Chinese food but I kick-boxed every morning and ran. If someone was filming you with your kit off you'd do the same thing.
It's really interesting with art-movies too but art especially - to see how your attitude toward artists and works and your level of appreciation of them is always shifting and changing over the years.
