A lot of people don't really understand what rehearsal's about. People are afraid they're gonna leave it in the dressing room, or you're gonna shoot your wad in rehearsal.
You don't really have to do the things that your character is doing. But us actors, we use something called sense memory. I've certainly been drunk before, and part of my job is to recall that without getting drunk.
Every couple of years we'll watch the movie and it's like watching home movies, seeing the ranch on-screen. But that movie Heaven's Gate, people are appreciating it more and more as time goes on.
I know how to dance with the wind, I can use its power by sailing this way, then that way, and again this way, till finally I get to you. With rowing, you're working primarily with your arms and shoulders. But with sailing, you're making bigger use of the wind and the waves.