I met someone who didn’t know the difference between unstable and legitimately crazy and then I realized I was kinda foggy on where the line was too. 

I thought of something I thought was a decent metaphor for it. It being Batman and the joker. The joker is legitimately insane, like a homicidal psychopath who I think can be considered a serial killer and mass murderer. But Batman is unstable because he runs around on top of buildings dressed as a bat fighting crime. 

Obviously it’s not exactly airtight but I kinda liked it