I'm human and I've played my butt off for ten years. I'm not a loafer, I'm not a jerk, I'm a baseball player.
Limits have to be set on how far one can simply use the... cleverness that we have to make changes.
I worked on 'Sarah Connor' even longer than 'Firefly.' And I always remembered how generous everyone was to me when I didn't know what to do, and I didn't know the rules, and I didn't know camera angles, and I didn't know lighting.