I stumbled upon this video and was completely struck by it. It is a series of MMA KOs. But where it is interesting is when the fighters are trying to describe the emotional ride that one goes through with a fight. To put it simply from personal experience, it is indescribable as to what goes through your mind and how you roller coaster through emotions in the build up and post fight. Its best to just watch it.
Unfortunately, the video has been taken down. I am looking for another copy of it.