What you're also talking about is passion. The fight has a context. You have a context. You're mad/sad/glad or scared, the situation is chaotic or not, etc. Many sham battles are sterile. They are really tactical demonstrations, or exercises, or something like that. For them to have passion, isn't necessarily harder. It just involves becoming part of the moment. That doesn't require a massive outlay of cash for the perfect kit, nor does it require the perfect reenactment. It does, however, ask that for a few minutes you take everything you know, and everything you are and mash them together in a magnificent bit of role-playing.
Pine River Boys, Co I, 7th Wisconsin
"We're... Christians, what read the Bible and foller what it says about lovin' your enemies and carin' for them what despitefully use you -- that is, after you've downed 'em good and hard."
-Si Klegg and His Pard Shorty