“I tell the director before I start, “If you want me to be innovative, give me the chance to make mistakes and maybe we can do something interesting.”… You can play safe and leave it all in, and you sit with the director and say, “Let’s trim here, let’s trim there,” but why not give the director a challenge? That’s what’s nice about film editing: there are a lot of little discoveries you make along the trip, and you put them in. If I find an interesting wrinkle, something different that might work, I say, “If I do it the way the director wants, he’ll never see this interesting little wrinkle.” I’m not doing my job unless I’m giving him options. That’s the key to this business.”
 

Michael Kahn Interview from Selected Takes: Film Editors on Editing by Vincent LoBrutto