Sometimes a scene works and acting is the easiest thing in the world and you don't have to do much of anything - just enjoy yourself and listen to the other actor. When it doesn't work, then every actor has different ways of dealing with the impasse. Sometimes you use memories from the past. Whatever. It depends from job to job.
Viggo MortensenNobody really knows anybody completely, even if they've been married to 'em for 53 years, you know?
Viggo Mortensen