Some say one of the main attractions of being a writer is being able to commit massive acts of violence… on the pages of a book, so no one gets arrested. 😉 Or as one mug put it, “You are perilously close to getting killed off in my next novel.”
To a certain extent, I find, this is true. Assuming emotional turmoil will let you write (not always a given), you can channel a lot of negative emotions and pure stress into a fight scene, a dramatic Reveal, a twist that shows a character was setting up to betray the hero all along. It’s one way to get it out of your head. And hopefully add to wordcount in the process.
(If emotional turmoil won’t let you write, I recommend weeding. Or breaking up kindling. Shredding old paperwork by hand. Anything you can do that’s destructive, yet gets something useful done.)
There are a few problems with this. First comes during writing. It can be very, very easy to write yourself into a destructive corner with the characters. “Rocks fall, everybody dies!” in short.
The other two come after writing. To start with, anything you write in the grip of severe emotion will evoke echoes of that emotion later. Meaning when you come back to that scene you’re likely to get hit with at least a fraction of what led you to write like a primal scream in the first place. Not good if you’re not expecting it.
The last problem is a bit more meta. The reader’s going to feel some of the emotion you put into the scene. So… if it’s a fight scene, for example, you need to look carefully at how much despair and anger leaks through, and whether or not that fits where the scene is in the book. A climactic final scene, a certain amount of “all is lost!” might be in order… before our heroes finally, skin-of-their-teeth, pull off a save. Smaller battle scenes leading up to that? Not so much.
So use emotion, but always realize there’s going to be edits after. Maybe lots of edits. Because I refuse to write stories where all is lost.