The fun part turns into the hell part. From having my thoughts race in such a way that my focus is honed on each topic (and I think whatever I say about each topic is brilliant) to not being able to focus on anything. From being very fidgety, to feeling there are little bugs inside of me and sitting still is excruciating. From mild paranoia (knowing that I might be wrong), to full blown paranoia (I really do believe I'm right and act on it [I once wrote a 5 page letter to a co-worker saying she was out to get me and cc'd it to my boss

).
Feeling as if there's evil inside me that literally/physically must be yanked/ripped out) Feeling like I have shattered into a million pieces and don't recognize myself in the mirror. From sounds and lights being very annoying to being agonizing, excruciating as if all sound were extreme and all light unbearable. Seeing things that aren't there and trusting my eyes that they have actually seen these things. They are scary things. Etc.