Magic. There are moments when you write when magic happens. You are in the head of your character and you have a fence post you are traveling towards, assuming you have even a sketchy outline, and then the character goes in a completely different direction than you had planned. You didn’t see it coming, but it works even better. Those are the moments we all write for. It makes for more work potentially, because now you may have to replan the outline, but let me tell you, it is worth it. It happens with free-writing as well, when you characters do something that surprises you.